Lateran Treaty
Negotiations for the settlement of the Roman Question began in 1926 between the government of Italy and the Holy See, and culminated in the agreements of the Lateran Pacts, signed—the Treaty says—for King Victor Emmanuel III of Italy by Benito Mussolini, Prime Minister and Head of Government, and for Pope Pius XI by Pietro Gasparri, Cardinal Secretary of State, on 11 February 1929. It was ratified on 7 June 1929. The agreements were signed in the Lateran Palace, hence the name by which they are known.
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.