Lateran Treaty
The Lateran Treaty (; ) was one of the Lateran Pacts of 1929 or Lateran Accords, agreements made in 1929 between the Kingdom of Italy and the Holy See, settling the "Roman Question". They are named after the Lateran Palace, where they were signed on 11 February 1929. The Italian parliament ratified them on 7 June 1929. It recognized Vatican City as an independent state, with the Italian government, at the time led by Benito Mussolini as prime minister, agreeing to give the Roman Catholic Church financial compensation for the loss of the Papal States. In 1947, the Lateran Treaty was recognized in the Constitution of Italy as regulating the relations between the state and the Catholic Church.
Pope Callixtus II
To secure the confirmation of this Concordat of Worms, Calixtus II convened the First Lateran Council on 18 March 1123. It solemnly confirmed the Concordat and passed several disciplinary decrees, such as those against simony and concubinage among the clergy. Decrees were also passed against violators of the Truce of God, church-robbers, and forgers of ecclesiastical documents. The indulgences already granted to the crusaders were renewed, and the jurisdiction of the bishops over the clergy, both secular and regular, was more clearly defined.