Vatican City

The World’s Smallest Country, By Almost Any Measure

Vatican City fits within the walls of a single Roman hilltop. At 0.49 square kilometres — roughly the footprint of a large shopping mall — it is less than one-eighth the size of Monaco, the next smallest sovereign state. Its permanent population hovers around 764, most of them cardinals, Swiss Guards, and members of the religious orders that staff the administration of the Catholic Church’s 1.4 billion members worldwide.

The country has no airport, no river, no agriculture, and no industry in any conventional sense. It has, however, a head of state (the Pope) whose moral influence reaches further than that of any other leader on earth, the world’s largest privately held art collection, and a central bank that operates in a currency (the Euro) it did not issue. It is among the only countries where it is possible to enter, attend a papal audience, see a Michelangelo, and leave — all on foot, all in a single morning.

St. Peter's Square seen from the colonnade at sunrise, with the Egyptian obelisk at the centre

A Brief History

The territory Vatican City occupies has a religious significance for Catholics that far predates its political independence. Tradition holds that Saint Peter, the first pope, was martyred in Nero’s circus on this hillside around 64 AD and buried near the site where his basilica now stands. Archaeological excavations beneath the current St. Peter’s in the 1940s uncovered a tomb that the Vatican identifies as Peter’s, with bone fragments carbon-dated to the 1st century.

The papacy’s temporal rule is much older than the modern microstate. From the 8th century until 1870, the popes governed the Papal States — a band of central Italian territory covering roughly the modern regions of Lazio, Umbria, the Marches, and parts of Emilia-Romagna, with a population at its peak of over three million. The unification of Italy under the Savoy monarchy ended this arrangement: Rome was taken by Italian troops in September 1870, and the pope retreated to the Vatican, declaring himself a “prisoner in the Vatican” — a diplomatic standoff that lasted 59 years.

The stalemate ended with the Lateran Treaty of 1929, signed by the Italian state (represented by Mussolini) and the Holy See (represented by Cardinal Gasparri). The treaty created Vatican City as an independent sovereign state, guaranteed its extraterritorial privileges, compensated the Church for the loss of the Papal States, and established Catholicism as Italy’s state religion (a clause later revised in 1984). This is the legal foundation of the country that exists today.

Territory and Urban Fabric

Vatican City occupies a low hill (the Mons Vaticanus) on the west bank of the Tiber, surrounded on three sides by the city of Rome and on the fourth by St. Peter’s Square, which is technically under shared jurisdiction during papal events. The territory is enclosed by a roughly 3.2-kilometre wall, most of it medieval, with additions by successive popes over several centuries.

What Fits Inside the Walls

Despite its size, the country is dense with distinct zones. St. Peter’s Basilica and the square occupy the eastern third. The Apostolic Palace — the pope’s official residence and workplace, including the Sistine Chapel — sits on the north side. The Vatican Museums complex, holding over 70,000 works of which 20,000 are displayed, winds through a kilometre and a half of corridors along the northern boundary. The Vatican Gardens cover the western half — formal Italian-Renaissance parterres that most visitors never see (they require a guided tour booked in advance).

The country also includes a small railway station, built in 1929, with 300 metres of track connecting to Italy’s national rail network. It is rarely used for passenger service and mostly serves freight deliveries and occasional papal travel.

Extraterritorial Properties

Beyond the walls, several properties in and around Rome are granted extraterritorial status under the Lateran Treaty — effectively treated as Vatican soil. These include the Basilica of St. John Lateran (the pope’s cathedral as Bishop of Rome), the papal summer residence at Castel Gandolfo, and the Pontifical Gregorian University. Combined with the city-state itself, they bring the territorial footprint of the Holy See to roughly 0.44 km² — still, in absolute terms, the smallest state in the world.

Governance and the Ecclesiastical Structure

Vatican City is an absolute elective monarchy. The pope holds supreme legislative, executive, and judicial authority and is elected for life by the College of Cardinals in a secret conclave held in the Sistine Chapel. He is simultaneously head of state of Vatican City, sovereign of the Holy See, and Bishop of Rome — three overlapping but legally distinct roles that are unusual in international law.

The distinction between Vatican City (the geographic state) and the Holy See (the government of the worldwide Catholic Church) is more than bureaucratic. The Holy See is the entity that maintains diplomatic relations with 184 countries, holds a permanent observer seat at the United Nations, and signs international treaties. Vatican City is the physical territory where the Holy See is headquartered — roughly analogous, if the analogy didn’t break almost immediately, to the relationship between the District of Columbia and the US federal government.

The Roman Curia

The day-to-day administration of the Holy See is carried out by the Roman Curia — a civil service of cardinals, bishops, and clergy organised into a set of dicasteries (departments) roughly equivalent to ministries. Pope Francis’s 2022 constitution Praedicate Evangelium restructured the Curia for the first time in 34 years, reducing the number of departments and opening several senior positions to lay members.

The Swiss Guard

The Pontifical Swiss Guard — about 135 soldiers who provide security for the pope and the Apostolic Palace — has been in continuous service since 1506, making it one of the oldest active military units in the world. Guards must be single Catholic Swiss males aged 19-30, at least 174 cm tall, with completed Swiss military service. Their famously striped uniforms are, contrary to popular belief, not designed by Michelangelo; they date from a 1914 redesign by commander Jules Repond based on early Renaissance sources.

The Economy

Vatican City does not have an economy in the usual sense — there is no GDP reported in World Bank or IMF figures, because the country has no commercial manufacturing, no agriculture beyond the gardens, and a labour force that is almost entirely employed by the Holy See or its institutions.

The state’s operating budget is financed primarily by donations from Catholics worldwide (the so-called “Peter’s Pence” collection, which brought in around €43 million in 2023), income from the Vatican Museums (roughly €100 million annually in ticket revenue), stamp and coin issuance (the Vatican issues its own postage stamps, and its rare coins sell at significant premiums to collectors), and returns on a financial portfolio managed by the Institute for the Works of Religion (IOR, often called the Vatican Bank).

The Vatican Bank has been the subject of recurring scandals and reform efforts — most recently under Pope Francis, who in 2014 restructured its leadership and aligned its compliance practices with international anti-money-laundering standards.

Culture and Religious Life

The culture of Vatican City is indistinguishable, in most respects, from the culture of the global Catholic Church. Latin remains the official language of most formal ecclesiastical documents, though Italian is the working language for administration and public speech. The liturgical calendar shapes daily life — major events like Christmas Midnight Mass and the Easter Urbi et Orbi blessing draw congregations of tens of thousands to St. Peter’s Square and a television audience of hundreds of millions.

Music has a particular status. The Sistine Chapel Choir (the Cappella Musicale Pontificia Sistina) has existed since at least the 14th century and is the personal choir of the pope. Its a cappella tradition includes the famous Allegri Miserere, which was — until Mozart supposedly transcribed it from memory in 1770 — forbidden to be performed outside the Sistine Chapel on pain of excommunication.

Art: The World’s Greatest Small Collection

The Vatican Museums are the single most important cultural institution in the smallest country, and among the most important in the world. The collection, accumulated by successive popes over five centuries, includes:

• The Sistine Chapel — Michelangelo’s ceiling (1508-1512) and Last Judgement (1536-1541), the defining works of the High Renaissance
• The Raphael Rooms (Stanze di Raffaello) — four chambers frescoed by Raphael between 1508 and his death in 1520, including the famous School of Athens
• The Pio-Clementino Museum — Classical sculpture, including the Laocoön (excavated in 1506) and the Belvedere Torso (both of which directly influenced Michelangelo)
• The Gallery of Maps — 40 frescoed maps of 16th-century Italy along a 120-metre corridor, commissioned by Pope Gregory XIII
• The Pinacoteca — 18 rooms of paintings from the 12th to 19th centuries, including works by Giotto, Leonardo (the unfinished St. Jerome), Caravaggio, and Bernini

The museums see approximately 7 million visitors per year, making them the most-visited museum in continental Europe. The Sistine Chapel is the bottleneck of the entire complex — its environmental control system struggles to handle the peak summer crowds, and visits are timed to control CO₂ buildup that could damage the frescoes.

Travel Guide: Practical Information

Entry and Access

There is no border control for Vatican City — it is entered freely from the streets of Rome, on foot through St. Peter’s Square. The square is always open. The basilica, museums, and gardens have regulated hours and, in some cases, ticketed entry.

Visiting the Vatican Museums

• Book online in advance — queues at the walk-up entrance can exceed three hours in peak season (June-August). The official site (museivaticani.va) charges €20 for standard admission plus a €5 reservation fee. Avoid third-party resellers.
• Best times — Tuesday or Thursday morning at opening, or late afternoon on the same days. Wednesdays are tricky because of the Papal audience. Mondays the museums are closed (as are most museums in Italy).
• Last Sunday of each month — free entry, but expect queues of 4-6 hours. Not recommended.

St. Peter’s Basilica

• Free entry, but security screening can add 30-60 minutes at peak times
• Dress code enforced — shoulders and knees must be covered, for men and women alike
• The dome climb costs €10 (stairs) or €15 (elevator part-way + stairs). Views across Rome from the top are the best in the city.
• The crypt — free, contains the tombs of 91 popes including the alleged tomb of St. Peter

Papal Audiences

• Wednesday General Audiences — held at 9:30 AM most Wednesdays when the pope is in Rome. Free tickets must be requested in advance (see vatican.va). Expect security screening from 7:30 AM.
• Angelus prayer — Sundays at noon, when the pope addresses the crowd from his study window overlooking St. Peter’s Square. No ticket required, simply show up.
• Urbi et Orbi blessing — Christmas Day and Easter Sunday, delivered from the central loggia of St. Peter’s. Massive crowds — arrive very early or watch from a rooftop bar.

Surprising Facts

1. The Vatican issues its own .va domain name — but unlike most country-code domains, it is used almost exclusively by the Holy See’s own institutions and is not available for private registration.³
2. The country’s ATM screens are the only ones in the world that operate in Latin, offering prompts like “Inserito scidulam quaeso ut faciundam cognoscas rationem.”³
3. Vatican City has no direct taxation — the state is funded entirely by donations, museum revenue, and financial returns. Citizens pay no income tax.³
4. The Swiss Guard halberds look ceremonial but are functional weapons, and guards still train with them as part of modern close-quarters defense drills.³
5. The Vatican Observatory (Specola Vaticana) dates to 1582 and operates a modern research station at Mount Graham in Arizona, making it the only country whose national observatory is located on another continent.³
6. Pope Francis chose to live in the Casa Santa Marta guesthouse rather than the traditional papal apartment in the Apostolic Palace — a break from 150 years of tradition signalling his ascetic preferences.³

Sources and References

See the list of cited sources in the page frontmatter — Holy See Press Office, Vatican Museums, Lateran Treaty text, UNESCO, Encyclopaedia Britannica, and the Annuario Pontificio.