Lateran Treaty

Setting the scene

The Lateran Treaty was signed on February 11, 1929, between Italy and the Holy See, ending the 59-year conflict between the Italian state and the Catholic Church that began when Italy seized Rome in 1870. The treaty was negotiated by Benito Mussolini for Italy and Cardinal Pietro Gasparri for Pope Pius XI. It consisted of three agreements: a political treaty, a financial convention, and a concordat.

What happened

The treaty created Vatican City as an independent sovereign state—44 hectares (110 acres), the world's smallest country—giving the Pope temporal sovereignty. Italy recognized Catholicism as the state religion, paid the Church 1.75 billion lira in compensation for seized lands, and the Church recognized Rome as Italy's capital and Italian sovereignty over former Papal States. The concordat gave the Church significant privileges in education and marriage law.

Why it still matters

The Lateran Treaty solved the 'Roman Question' and gave Mussolini prestige domestically and internationally. For the Church, it secured independence and financial stability. The treaty was controversial—critics argued it legitimized fascism, and Pius XI later clashed with Mussolini over Catholic youth groups. The treaty remains in force today, though revised in 1984 to end Catholicism as Italy's state religion. It established the model for church-state relations and demonstrated how authoritarian leaders could use religious agreements to gain legitimacy.

Background

Church-state relations were regularized.