Lateran Treaty,treaty (effective June 7, 1929, to June 3, 1985) betweenItaly and the Vatican. It was signed byBenito Mussolini for the Italian government and by cardinal secretary of statePietro Gasparri for thepapacy and confirmed by the Italian constitution of 1948.

Upon ratification of the Lateran Treaty, the papacy recognized the state of Italy, with Rome as its capital. Italy in return recognized papalsovereignty over theVatican City, a minute territory of 44 hectares (109 acres), and secured full independence for thepope. A number of additional measures were agreed upon. Article 1, for example, gave the city of Rome a special character as the “centre of theCatholic world and place of pilgrimage.” Article 20 stated that all bishops were to take an oath of loyalty to the state and had to be Italian subjects speaking theItalian language.

By article 34 the state recognized the validity of Catholicmarriage and its subjection to the provisions of canon law; nullity cases were therefore reserved to theecclesiastical courts, and there could be no divorce.

The state agreed by article 36 of the concordat to permit religious instruction in the public primary and secondary schools and conceded to the bishops the right to appoint or dismiss those who imparted such instruction and to approve the textbooks that they used.

With the signing of theconcordat of 1985,Roman Catholicism was no longer the state religion of Italy. This change in status brought about a number of alterations in Italian society. Perhaps the most significant of these was the end to compulsory religious education in public schools. The new concordat also affected suchdiverse areas as tax exemptions for religious institutions and ownership of the Jewish catacombs.