Learn about the fascinating history of Vatican City | Origins of the city-state

Sprawling over just 100 acres, Vatican City is the smallest country in the world. This region was a part of Rome for the longest time (200 years to be precise) but it gained independence in 1929 and since then been governed as an absolute monarchy with the pope being the head. Covering approximately one-eighth the size of the NY Central Park - you can explore this country within just a few hours. The best part? You don’t even need a visa!

Vatican timeline

  • 4th Century AD: Old St. Peter’s Basilica built
    Commissioned by Emperor Constantine over St. Peter’s tomb.

  • 756: Papal States established
    Pepin the Short donates territory, founding Vatican’s political base.

  • 1377: Papacy returns to Rome
    After the Avignon Papacy, the Pope re-establishes Rome as the seat.

  • 1506–1626: New St. Peter’s Basilica constructed
    Major Renaissance project led by Bramante, Bernini, and Michelangelo who also painted the Sistine Chapel ceiling.

  • 1870: Papal States annexed by Italy
    Vatican loses temporal power; Pope becomes “prisoner in the Vatican.”

  • 1929: Lateran Treaty signed
    Vatican City recognized as an independent state by Italy.

  • 1934–1958: Pius XII and WWII era
    The first and the only railway station was opened. Vatican maintains neutrality; criticized for limited Holocaust response.

  • 1962–1965: Second Vatican Council held
    Major reforms in Catholic doctrine and modernization of the Church.

  • 2005: Death of Pope John Paul II
    One of the most influential popes; drew millions to the Vatican.

  • 2013: Pope Benedict XVI resigns
    First papal resignation in 600 years; Pope Francis elected.

  • 2025: Year of Jubilee and Pope Leo
    Amidst the Vatican Jubilee, Pope Francis passes; Cardinal Robert Prevost is elected.

The Vatican's history explained

Early history

1st century BC - 41 AD

During the Roman Republic, "Vatican" referred to the Ager Vaticanus, a flood-prone area near Etruscan Veii. By the 1st century AD, it included today’s St. Peter’s Square. Between 14 BC and 33 AD, Agrippina the Elder drained the land, her son Caligula built a circus there, and Emperor Nero finished it. The area soon became a Christian martyrdom site, including for St. Peter.

Earliest church & papal states

326 - 1377 AD

Between 318–322 CE, construction began on Old St. Peter’s Basilica over Saint Peter’s believed tomb; a palace followed in the 5th century under Pope Symmachus. Popes later ruled the Papal States and lived at the Lateran and Quirinal Palaces, with a temporary move to Avignon, France, from 1309 to 1377.

Roman question

1870 - 1878

In 1870, Italy unified under King Victor Emmanuel II, triggering the 'Roman Question' over the Pope’s status (1861–1929). Italy seized church properties, including the Quirinal Palace. Popes stayed within the Vatican, refusing to recognize Italy’s rule in Rome. Pope Pius IX was called a "prisoner in the Vatican" as popes shifted focus to spiritual roles.

Lateran Treaty

1929

Negotiations to resolve the Roman Question began in 1926, leading to the Lateran Pacts, signed on 11 Feb 1929 by Mussolini for King Victor Emmanuel III and Cardinal Gasparri for Pope Pius XI. Ratified in June, the treaty established Vatican City as an independent country, thereby granting 44 hectares (109 acres) of land that would now be fully independent and governed by the pope.

World War II

1939 - 1945

During WWII, under Pope Pius XII, Vatican City remained neutral and unoccupied, even as Rome fell to German forces. Both Axis and Allied powers respected its neutrality; even stray pamphlets drew papal protest. The U.S. opposed bombing Rome and allowed Catholic airmen to opt out of raids on Rome and Church sites.

Vatican post-war

After 1945

Pius XII appointed 32 cardinals in 1946 to fill wartime vacancies. In 1970, the Pontifical Military Corps was disbanded, except the Swiss Guard; the Gendarmerie became civilian police. A 1984 concordat with Italy ended Catholicism as the state religion. In 1995, plans for Domus Sanctae Marthae – a guesthouse adjacent to St. Peter's Basilica, sparked environmental protests and tensions with Italy.

Vatican City today

Vatican History

Today, with a minute population of just 1,000 people, Vatican City is an absolute monarchy. A home to some of the world famous churches and museums, Vatican City is surely a cultural and a historical treasure. St. Peter's Basilica, one of the world's largest churches, the Vatican Museums, and the world famous Sistine Chapel are a few wonders that attract millions of tourists to this tiny paradise.

About Vatican City

Frequently asked questions about the Vatican's history

The Vatican City became an independent state on February 11, 1929, with the signing of the Lateran Treaty between the Holy See and Italy under Mussolini.

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