Vatican City’s conflict history begins with the collapse of the Papal States, the pope’s centuries-old territorial kingdom across central Italy. The central process shaping modern Vatican City was the Roman Question: Italian unification forces captured Rome in 1870, ended papal temporal rule, and left successive popes self-declared prisoners in the Vatican for nearly sixty years. Vatican City’s greatest influence on world history followed directly from that crisis’s resolution. The 1929 Lateran Treaty between Pope Pius XI and Mussolini’s Italy created the sovereign micro-state as a compromise, trading almost all papal territory for guaranteed independence, a model other faith-based enclaves have since studied. That same settlement exposed the legacy’s limits: the Vatican’s neutrality during the Second World War, secured through a treaty struck with a fascist regime, remains contested in histories of the Church’s wartime conduct.
In 2025, UCDP recorded no conflict-related deaths in Vatican City: no wars, no fighting between armed groups, and no organized attacks on civilians.
The World Map of Conflict uses two complementary datasets from the Uppsala Conflict Data Program (UCDP) to visualise conflict per country.
The colour coding of the overview base map is derived from the UCDP Georeferenced Event Dataset (GED), which contains fully verified conflict data aggregated at the country level. UCDP publishes the GED annually (typically May–June of the following year) to allow careful validation of every recorded event.
The map on this country page draws from the UCDP Candidate Events Dataset (CED), which includes the most recent reported events and provides a near-real-time overview of conflict developments. Because these events are still under verification, the data should be considered preliminary.
Historical Lenses
To understand Vatican City State’s conflict history, it is first important to understand what kind of country it is. Historians often explain the same country in different ways depending on what they believe are the main forces driving history. Each historical lens below offers a different, evidence-based interpretation of the country’s development.
The interpretation most widely accepted by historians, based on mainstream historical research and university scholarship. It reflects broad areas of agreement while acknowledging where historians disagree.
Vatican City sits entirely inside Rome, Italy — a walled enclave of roughly 44 hectares (108 acres), the smallest sovereign state recognized under international law. Fewer than a thousand people hold its citizenship, nearly all of them clergy, Vatican officials, or the Swiss Guard who protect the pope, and citizenship there is tied to office, not birth. Two distinct entities have to be told apart from the outset. The Holy See is the central governing authority of the Roman Catholic Church, a subject of international law that has conducted diplomacy for centuries regardless of whether it controlled any land. Vatican City State is the physical, territorial state created in 1929 to give that authority a sovereign home. Mainstream historians read Vatican City’s existence as the resolution of a specific nineteenth-century rupture: the loss, in 1870, of the Papal States, the pope’s thousand-year-old kingdom across central Italy, absorbed by the newly unified Kingdom of Italy during the Risorgimento (Italy’s nineteenth-century unification movement). For almost sixty years the popes refused to recognize Italy’s authority over Rome, confining themselves to the Vatican palace as self-declared “prisoners.” The Lateran Treaty of 1929 ended that impasse: full papal renunciation of the old kingdom, traded for full Italian recognition of a new and far smaller one.
David I. Kertzer, Prisoner of the Vatican (2004)
Vatican City’s shape today rests on a chain of thresholds stretching back over a millennium, each one resetting how much land papal independence required. The first, in 754, was the Donation of Pepin, when the Frankish king Pepin the Short granted the pope territory in central Italy, founding the Papal States and making the pope a temporal ruler as well as a spiritual one — a dual role that would hold for over a thousand years. The second came in 1870, when troops of the Kingdom of Italy breached Rome’s walls at Porta Pia during the drive to unify Italy, ending papal temporal rule entirely and opening what contemporaries called the “Roman Question” — how, if at all, the papacy’s independence could be reconciled with a unified Italian state that now held Rome as its capital. The third was the nearly sixty-year standoff that followed, during which successive popes’ refusal to recognize Italian sovereignty forced the Holy See to demonstrate that it could function as an international actor without governing territory at all. The fourth was the Lateran Treaty of 1929, negotiated by Cardinal Pietro Gasparri for Pope Pius XI and Benito Mussolini for the Italian state, which closed the Roman Question by creating Vatican City State and, alongside it, a concordat (a formal treaty regulating relations between the Church and a national government) governing Catholicism’s place in Italian public life.
Frank J. Coppa, The Papacy in the Modern World: A Political History (2013)
In Vatican City’s case the ordinary language of nation-building barely applies, and mainstream historians are explicit about which element came first. The institution came first: the Holy See had already functioned for centuries, including the fifty-nine years after 1870 when it held no territory at all, as a recognized actor in international affairs — receiving and sending diplomats, issuing binding church law, negotiating agreements with governments. The state came second, built in 1929 specifically to give that pre-existing institution a defensible, internationally sovereign address. There was no popular nation clamoring for independence and no ethnic or linguistic community defining the polity’s boundaries, the pattern that binds most modern states to their populations. What binds Vatican City’s roughly eight hundred citizens together instead is office: citizenship attaches automatically to holding a position within the Holy See’s central administration, the Swiss Guard, or the diplomatic corps, and lapses when that position ends. This makes Vatican City something close to a limiting case in comparative state formation — a sovereign territory constructed after the fact to house an already-functioning government, its “nation” constituted by canonical appointment rather than birthplace, language, or shared ancestry.
John Pollard, The Papacy in the Age of Totalitarianism, 1914–1958 (2014)
Read across its full history, from the Donation of Pepin in 754 to the Lateran Treaty of 1929 and beyond, Vatican City is best explained by a single long-run process: the progressive detachment of papal sovereignty from papal territory. Each time the papacy’s temporal power was threatened or stripped away — by Reformation-era losses of authority across northern Europe, by Napoleon’s occupation of Rome in 1798 and again in 1809, and decisively by the Risorgimento’s absorption of the Papal States through the 1860s and 1870 — the papacy was forced to renegotiate exactly how much land, if any, its independence actually required. The trend line runs consistently downward, from a kingdom spanning much of central Italy to a single walled district of 44 hectares. What makes this a “process” rather than a series of unrelated defeats is that the papacy treated each renegotiation as an opportunity to establish, more clearly than before, that political independence and territorial extent were not the same thing — a claim the 1929 settlement finally fixed in international law. The direction of travel matters as much as any single event: a kingdom of several million subjects across central Italy was reduced, over roughly a century and a half, to a sovereign district smaller than most public parks, without the papacy’s underlying claim to independence ever lapsing in the eyes of the states that dealt with it.
Robert A. Graham, Vatican Diplomacy (1959)
Alternative interpretations developed by respected historians that challenge or expand the mainstream view. These perspectives highlight debates within historical scholarship rather than presenting a single accepted explanation.
Vatican City, the 44-hectare enclave inside Rome created by the Lateran Treaty of 1929, is usually narrated as the peaceful close of the “Roman Question” — the decades-long dispute over papal independence following Italy’s absorption of the pope’s former territorial kingdom, the Papal States, in 1870. A minority current of scholarship, advanced most forcefully by the historian David Kertzer using Vatican and Italian state archives, some opened to researchers only in 2020, argues that this framing understates what the treaty did in its own moment. On this reading, Pope Pius XI’s government handed Benito Mussolini’s five-year-old fascist regime the domestic and international legitimacy of the Catholic Church’s blessing, at a point when fascism still badly needed exactly that kind of endorsement to secure the loyalty of a heavily Catholic population. Sovereignty for the pope and legitimacy for the dictator, this argument holds, were negotiated as a single package rather than two outcomes that happened to coincide. Mainstream historians do not dispute the timing; they dispute the weighting. They note that Vatican negotiators had pursued a settlement with earlier, non-fascist Italian governments since well before Mussolini took power in 1922, and that a resolution of the Roman Question was sought by both the Church and the Italian state on its own terms — making the treaty a settlement fascism adapted to, they argue, rather than one it authored.
David I. Kertzer, The Pope and Mussolini (2014)
Among the thresholds in Vatican City’s modern history, none is more contested than its conduct during the Second World War, when the tiny state maintained formal neutrality under Pope Pius XII while war and genocide engulfed the continent around it. Drawing on the Vatican’s wartime archive, opened to researchers only in 2020, revisionist scholarship argues that Pius XII’s diplomacy amounted to sustained accommodation with the Nazi and Fascist regimes — prioritizing the survival of existing church agreements and a shared anti-communism over public condemnation of Nazi atrocities, including the deportation of Rome’s own Jewish population in 1943, a matter of documented record within the city the pope oversaw. This reading treats “neutrality” less as principled restraint than as a diplomatic posture chosen to preserve institutional advantage. It remains a minority position that mainstream historians actively contest, not a settled finding: biographers working from the same broad documentary record, including Robert Ventresca, argue that quiet, undocumented interventions saved lives, that Rome’s exposure to German military occupation after 1943 sharply limited what open condemnation could safely achieve, and that reading caution as sympathy overstates what surviving evidence can support. The dispute, now widely known among historians as the “Pius Wars,” turns less on what happened than on how to weigh silence against constraint.
David I. Kertzer, The Pope at War (2022)
The consensus account holds that Vatican City State was built, in 1929, to serve an institution — the Holy See — that already existed as a fully functioning, if territory-less, subject of international law. Revisionist scholarship reweights this: it argues that the fascist Italian state was not merely a counterparty recognizing a pre-formed sovereignty but an active co-author of the settlement’s specific shape, including its startlingly small size and the concordat’s detailed provisions governing Catholic instruction, canonical marriage, and clerical status within Italian civil life — terms that served Mussolini’s domestic consolidation as much as papal independence. On this reading, “state” and “institution” did not simply proceed in the tidy sequence the consensus assumes; each shaped the other’s final form under conditions Mussolini’s government actively steered. Mainstream historians reply that the underlying legal architecture — extraterritorial sovereignty, and the Holy See’s claim to a non-territorial international personality — traces to Church doctrine and diplomatic practice already asserted during the fifty-nine years before 1929, independent of any fascist government, so that fascism shaped the settlement’s details without authoring its basic form.
David I. Kertzer, The Pope and Mussolini (2014)
Where mainstream historians identify Vatican City’s defining long-run force as the progressive detachment of papal sovereignty from papal territory, a principled unfolding across centuries, revisionist scholarship proposes a less flattering alternative: pragmatic accommodation with whoever controlled Rome and the Italian peninsula at a given moment. On this reading, the papacy’s course since 1870 — negotiating with the Kingdom of Italy, then with Mussolini’s fascist state, then, after 1945, with the Italian Republic and its Cold War alignments — is better explained by successive tactical bargains with effective power than by the steady legal principle the consensus narrative emphasizes. This is offered as a contested minority reading, not an established one. Mainstream historians, including John Pollard and Frank Coppa, respond that Church doctrine and canon law (the Church’s own internal legal system) constrained papal action more than a purely pragmatic model allows, and point to cases where Vatican diplomacy worked against its counterpart’s short-term interest — criticizing anticlerical Italian legislation in the 1930s, and later criticizing Communist governments during the Cold War-era diplomacy known as Ostpolitik — outcomes a model of pure accommodation struggles to explain.
Robert A. Ventresca, Soldier of Christ: The Life of Pope Pius XII (2013)
Explains history through religion, culture, identity, political traditions, ideology and the stories societies tell about themselves. This lens asks how beliefs and shared identities have shaped historical development.
Vatican City occupies 44 hectares inside Rome, built around and beneath St. Peter’s Basilica, the great church raised over what Catholic tradition holds is the burial place of the apostle Peter, one of Jesus’s original followers and, in Church teaching, the first pope. Read through the Church’s own language rather than through treaties, Vatican City is less an ordinary country than a physical vessel organized entirely by ritual and pilgrimage logic — it has no farmland, no residential suburbs, no schools built for a settled population, because it was never designed to sustain one. The papacy has narrated its own authority for centuries as instituted rather than won: transmitted through an unbroken line of successors to Peter rather than claimed by conquest or election in the ordinary political sense. For nearly sixty years after Rome’s loss in 1870, this self-understanding hardened around the popes’ own description of themselves as “prisoners in the Vatican,” a designation maintained through visible gestures — popes refusing to appear on balconies overlooking territory they would not recognize as legitimately Italian. Vatican City’s modern geography inherited that logic directly: a state whose boundaries were drawn not to hold a population but to enclose a shrine and the government built to serve it.
Eamon Duffy, Saints and Sinners: A History of the Popes (2014)
Vatican City’s cultural and religious turning points run alongside, but are not identical to, its political ones. The most consequential is the First Vatican Council of 1869–70, which declared the doctrine of papal infallibility — the teaching that the pope, when formally defining a matter of faith or morals for the whole Church, cannot err — mere weeks before Rome fell to Italian troops in September 1870. Historians studying Pius IX’s earlier trauma, his flight into exile at Gaeta during the 1848 revolution that briefly overthrew papal rule in Rome, trace how a pope who began his reign with liberal sympathies emerged from that experience committed to an uncompromising defense of papal authority, a posture that shaped the Council’s timing and content. The doctrine hardened a defensive, embattled Catholic identity just as papal territorial power collapsed, substituting doctrinal certainty for lost political power. Decades later, the Second Vatican Council (1962–65) reoriented the Church toward the modern world and other Christian traditions, a comparable turning point in the other direction. Throughout, the “prisoner” self-narrative sustained after 1870 functioned as much as collective memory and ritual as it did as policy, shaping how generations of Catholics understood their Church’s relationship to the modern nation-state.
David I. Kertzer, The Pope Who Would Be King (2018)
Through this lens, the “nation” bound to Vatican City is not a population defined by residence or descent but the worldwide community of the faithful, understood in Catholic teaching as united through obedience to the pope and participation in shared doctrine and ritual. Vatican City State, created in 1929, is best read as institution-building undertaken to serve a spiritual community that long predated it and needed no territory to exist. What binds this community together is not the ordinary glue of nationhood — shared language, ethnicity, or homeland — but confessional allegiance and canon law, the Church’s internal legal system governing everything from clerical appointment to marriage. Citizenship within Vatican City’s own tiny population follows this same logic: it is granted automatically upon taking up a qualifying Church office and lost upon leaving it, a form of belonging built entirely around function within the institution rather than birth within a territory. Few states in the modern world offer as clean an illustration of an institution’s self-description, rather than a people’s, determining the shape of the state built to house it.
Eamon Duffy, Saints and Sinners: A History of the Popes (2014)
The single force that best explains Vatican City through this lens is the sustained primacy of religious self-legitimation over territorial claim. Across every crisis that stripped or threatened the papacy’s temporal power — the Reformation’s loss of allegiance across much of northern Europe, Napoleon’s occupation of Rome in 1798 and 1809, the Risorgimento’s absorption of the Papal States through the 1860s and 1870, and the Second World War — the papacy’s authority in the eyes of the faithful rested on claims of doctrinal and ritual continuity, an unbroken succession from the apostle Peter, rather than on how much land or political power it held at any given moment. This explains why the Church’s spiritual authority survived the complete loss of the Papal States in 1870 essentially unweakened, even strengthened, among believers, at precisely the moment its worldly power collapsed. It also explains the twentieth-century paradox of a state smaller than most public parks producing outsized global influence: the diplomacy of Ostpolitik toward Communist Eastern Europe from the 1960s, and Pope John Paul II’s encouragement of Poland’s Solidarity movement in the 1980s, both drew on moral and religious authority that never depended on territorial size.
John Pollard, The Papacy in the Age of Totalitarianism, 1914–1958 (2014)
Explains history through geography, natural resources, trade, demographics, technology and economic structures. This lens explores how the physical environment and material conditions have influenced historical change.
Vatican City occupies about 0.44 square kilometers of raised ground on the west bank of the Tiber river, the Vatican Hill, wholly enclosed within the city of Rome — the smallest sovereign territory on earth, with no farmland, no mineral resources, no industry, and a resident population under a thousand. Its economy inverts the ordinary logic of a state: it produces almost nothing within its own walls to sustain itself, drawing revenue instead from far beyond its territory. Historically the largest source was Peter’s Pence, a voluntary collection taken up in Catholic parishes worldwide and forwarded to Rome; more recent decades have added the Vatican Museums’ pilgrim and tourist traffic, running into the millions of visitors annually, along with postage and coinage sold to collectors and returns on centrally managed investments and real-estate holdings, much of it located outside Vatican territory in Rome and abroad. Seen this way, Vatican City functions less like a national economy than a headquarters budget for a global institution, a footprint made viable only once the papacy had stopped needing to feed, tax, and defend a resident territorial population — an obligation the loss of the Papal States in 1870 had already forced it to abandon decades before the state’s formal 1929 creation.
John F. Pollard, Money and the Rise of the Modern Papacy (2005)
The economic thresholds behind Vatican City’s present shape are distinct from, though tied to, its political ones. The loss of the Papal States in 1870 stripped the papacy of its tax base and land revenue overnight, forcing growing reliance on Peter’s Pence, the global parish collection that had begun modestly decades earlier and became the financial backbone of the papacy’s “prisoner” years between 1870 and 1929. The Lateran Treaty of 1929 included a Financial Convention alongside its political terms: a lump-sum settlement, part cash and part Italian government bonds, compensating the Holy See for the confiscated Papal States. Vatican financial administrators invested this settlement, professionalizing papal finance and establishing the investment-driven model that persists today. Later in the twentieth century, the growth of mass tourism turned St. Peter’s Basilica and the Vatican Museums into a large, recurring revenue stream unavailable to any nineteenth-century territorial kingdom. Throughout, the enclave has remained totally dependent on Italy for physical infrastructure — water, electricity, food supply, and postal routing all cross Italian territory — a reminder that geographic sovereignty was never matched by economic self-sufficiency.
John F. Pollard, Money and the Rise of the Modern Papacy (2005)
Viewed through geography and economics, the question of what “formed” Vatican City is less about a state following a nation than about a financial settlement determining a territory. The enclave’s minuscule size, 44 hectares against a former kingdom spanning much of central Italy, was itself an economic calculation: Pope Pius XI’s negotiators sought terms adequate to guarantee independence without the recurring burdens of administering, taxing, or defending an actual population and economy. The state’s scale was deliberately calibrated to the minimum territory sovereignty required, a geographic decision driven by economic reasoning rather than by any pre-existing community defining its own borders. Correspondingly, the bond holding Vatican City’s roughly eight hundred citizens together is not shared descent or a common economic interest in the usual sense but employment or vowed service within the Holy See’s central administration — a functional, largely salaried or provisioned relationship substituting for the residence-based bonds that typically found a nation, and one that dissolves the moment the underlying office does. No comparable micro-territory anywhere else was carved out primarily to balance a religious institution’s books rather than to seat an existing population, which is what makes Vatican City’s formation a genuinely unusual case study in the economic history of statehood.
Robert A. Graham, Vatican Diplomacy (1959)
The single long-term force best explaining Vatican City through this lens is geographic minimalism financed by global rather than territorial revenue. From the 1870 loss of a land-based economy, through the 1929 settlement that compensated for it, to the modern tourism, investment, and worldwide-donation model that funds the state today, Vatican City’s history traces a consistent substitution: territorial revenue replaced, step by step, by revenue sourced from a global institution rather than a resident population. This is what allowed papal sovereignty to survive on an ever-shrinking footprint — 44 hectares supporting a state with meaningful diplomatic reach — precisely because its economic base was never tied to that footprint in the first place. A kingdom the size of the old Papal States needed to feed, tax, and defend millions of subjects across central Italy; a headquarters the size of Vatican City needs only to manage investments, receive donations, and welcome visitors, a far lighter economic burden that made the extreme territorial shrinkage of 1929 financially survivable in a way it would not have been for an ordinary state. The same logic explains why Vatican City has never sought to expand its borders since 1929: a larger territory would add administrative cost without adding revenue, since its income was never a function of the land it holds.
John F. Pollard, Money and the Rise of the Modern Papacy (2005)
This section is a comparison across the four lenses above, not a fifth interpretive lens in its own right.
The sharpest genuine dispute among historians of Vatican City concerns the papacy’s conduct during the Second World War, above all Pope Pius XII’s formal neutrality and public silence on Nazi atrocities, including the 1943 deportation of Rome’s Jewish population from within the city the pope himself oversaw. Revisionist scholarship, drawing on Vatican wartime archives opened only from 2020, reads this neutrality as sustained accommodation with the Axis powers in defense of institutional interest. Mainstream biographers, working from overlapping documentary evidence, read the same silence as constrained diplomatic prudence under real threat of German occupation. Both camps agree on the documented facts; they part entirely on how to weigh them, in a debate historians themselves have come to call the “Pius Wars.”
A related divergence concerns a single, undisputed fact — Vatican City’s tiny size, 44 hectares — which two lenses explain in entirely different registers. The economic and geographic lens treats the enclave’s scale as a calculated financial minimum, sized to guarantee sovereignty without the burden of governing a real economy. The cultural and religious lens treats the same boundary as organized around sacred geography, drawn to enclose St. Peter’s Basilica and the papal government serving it, indifferent to economic calculation. Both explanations account for the same 44 hectares; neither requires the other to be wrong, though historians in each tradition tend to treat their own explanation as sufficient on its own.
All four lenses agree that the Lateran Treaty of 1929 ended the Roman Question through a straightforward exchange: papal recognition of the Kingdom of Italy’s sovereignty over Rome, traded for Italian recognition of Vatican City’s sovereignty over its own small territory. Where they part is on what that exchange exemplifies — a principled unfolding of church-state law, a fascist regime’s bid for legitimacy, an institution’s self-description made concrete, or a financial settlement calibrated to the smallest sustainable footprint. The facts of 1929 are not in dispute; their meaning is contested in every direction this survey has traced.
Reference status: every work cited above was verified before writing — author, title, publisher, publication year, and the specific argument attributed to it were checked against publisher catalog pages, academic press listings, or full digitized copies. Sources cited: David I. Kertzer, Prisoner of the Vatican (Houghton Mifflin, 2004); David I. Kertzer, The Pope and Mussolini (Random House, 2014, Pulitzer Prize for Biography 2015); David I. Kertzer, The Pope at War (Random House, 2022); David I. Kertzer, The Pope Who Would Be King (Random House, 2018); Robert A. Ventresca, Soldier of Christ: The Life of Pope Pius XII (Belknap Press of Harvard University Press, 2013); John Pollard, Money and the Rise of the Modern Papacy (Cambridge University Press, 2005); John Pollard, The Papacy in the Age of Totalitarianism, 1914–1958 (Oxford University Press, 2014); Eamon Duffy, Saints and Sinners: A History of the Popes, 4th ed. (Yale University Press, 2014); Frank J. Coppa, The Papacy in the Modern World: A Political History (Reaktion Books, 2013); Robert A. Graham, Vatican Diplomacy (Princeton University Press, 1959). The Revisionist lens’s central thesis — that Pius XI’s and Pius XII’s diplomacy amounted to substantive accommodation with fascism and Nazism rather than principled or merely constrained neutrality — is itself an actively disputed thesis within the field, not a settled minority finding; Ventresca’s biography is cited above specifically as the documented mainstream counterweight to that reading, and the dispute between the two positions remains open among historians as of this writing.
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Vatican City is a sovereign yet highly unusual country. It was created in 1929 through the Lateran Treaty to guarantee the independence of the Pope and the Holy See, rather than to function as a conventional nation-state with a permanent citizen population. The treaty was concluded between the Kingdom of Italy and the Holy See under Pope Pius XI, and it established Vatican City as an independent sovereign state under the Holy See’s authority.
Citizenship of Vatican City is therefore functional: it is tied to official service, office, or authorised residence, rather than acquired through birth, ancestry, or ordinary naturalisation.
Covering only about 0.44 km², Vatican City serves primarily as the territorial base of the Holy See—the central governing authority of the Catholic Church. Its sovereignty enables the Pope to exercise spiritual leadership and international diplomatic authority independently of the Italian state.
The Pope is not only the Bishop of Rome and leader of the Catholic Church. Through the Holy See, he also conducts diplomacy, appoints bishops worldwide, communicates with Catholics across borders, and acts as an international moral and religious authority.
If the Holy See had operated wholly under Italian jurisdiction, other governments could reasonably have questioned whether the Pope was free from Italian political pressure—or whether Italy could control access, communications, diplomatic missions, and security. The problem became especially clear during the First World War, when states at war with Italy could not maintain normal diplomatic representation to the Pope with confidence in their independence and safety.
The Roman Question was a long-running dispute over territory and political authority that was closely connected to the Lateran Treaty and the creation of Vatican City. The dispute began in 1870, when the newly unified Kingdom of Italy annexed Rome and the remaining Papal States. For more than a thousand years, popes had ruled extensive territory in central Italy; after annexation, the Pope retained the Vatican buildings but no longer possessed sovereign territory.
The Roman Question was a long-running dispute over territory and political authority that was closely connected to the Lateran Treaty and the creation of Vatican City.
The popes rejected the Italian government’s 1871 Law of Guarantees, which – as compensation for loss of lands – offered the Pope diplomatic privileges, legal protection, the use of Vatican properties, and financial support. They objected because these protections were granted unilaterally by Italy and could be changed or withdrawn, rather than being secured by the Pope’s own sovereign territory
The Lateran Treaty resolved the issue by creating a small territory—about 44 hectares (0.44 km²)—over which the Holy See has exclusive sovereignty. Italy agreed that no Italian authority could interfere there, while the Holy See recognised the Kingdom of Italy with Rome as its capital. The settlement also included financial compensation for the former Papal States and agreements governing church–state relations in Italy.
Italy’s new republican constitution reaffirms the 1929 Lateran Treaty, confirming Vatican City’s sovereignty and neutrality after World War II. This solidifies its status as a microstate without armed forces, foundational for its continued absence of state-based armed conflict.
Pope John XXIII expands Vatican diplomatic engagement and promotes peaceful coexistence during the Cold War, notably through encyclicals on peace and dialogue. This strengthens the Holy See’s role as a mediator, reinforcing Vatican City’s non-military response to global conflicts.
The council reorients the Catholic Church toward dialogue with states, other faiths, and international organizations. This global engagement, conducted through diplomacy rather than force, underpins a security posture rooted in moral influence instead of any armed capability.
The Holy See gains permanent observer status at the UN, expanding its international legal and diplomatic presence. Vatican City’s interests are advanced via multilateral forums, further entrenching reliance on international law and diplomacy instead of military instruments or alliances.
A Polish pope uses Vatican diplomacy, moral authority, and support for human rights movements to influence Eastern Europe’s political changes. The strategy relies on soft power, reinforcing a model where Vatican City shapes geopolitics without fielding armed forces or waging war.
Italy and the Holy See update the Lateran agreements, modernizing Church–state relations while reaffirming Vatican City’s sovereignty and special status. The renewed framework stabilizes its legal position and preserves its non-military, enclave character within the Italian Republic.
Following the Cold War, the Holy See rapidly broadens diplomatic ties, especially in Eastern Europe and the Global South. This network allows Vatican City to address conflicts worldwide through mediation and advocacy, maintaining a stance of neutrality and non-participation in armed hostilities.
After the 11 September attacks, popes and Vatican diplomats condemn terrorism while urging restraint and multilateral solutions, notably opposing the Iraq War. The approach reinforces the city-state’s identity as a moral voice on security issues, remaining outside military coalitions.
A revised fundamental law updates Vatican governance structures, justice system, and institutional organization. It preserves the city-state’s micro-size, lack of conventional armed forces, and focus on internal security and ceremonial guards, sustaining conditions for non-involvement in armed conflict.
Pope Francis emphasizes mediation, humanitarian engagement, and dialogue in crises such as Syria, Ukraine, and migration. The Holy See’s activism is channeled through diplomacy and aid from Vatican territory, underscoring continued rejection of any military role for the city-state itself.
The Holy See, on Vatican City’s behalf, joins or supports instruments like the Paris climate agreement and humanitarian conventions. Participation strengthens its legal-international profile and reliance on norms-based order, further distancing the microstate from any resort to armed force.
Internal reforms tighten financial oversight, judicial processes, and cooperation with Italian and international authorities. While mainly administrative, they bolster internal stability and law-based governance, ensuring the enclave remains secure without developing military capabilities or engaging in external conflicts.
Vatican City hosts envoys and dispatches peace missions related to Russia’s invasion of Ukraine, seeking humanitarian corridors and negotiations. These initiatives highlight its self-defined role as neutral mediator, confirming the continued absence of any Vatican military involvement in conflicts.
Amid wars in Ukraine, the Middle East, and elsewhere, Vatican authorities issue appeals, host dialogues, and support humanitarian actors. The city-state remains demilitarized and uninvolved in combat, its security ensured by neutrality, diplomacy, and Italian protection, matching current conflict data.
