First Lateran Council

The first general council held in the West. It ratified the Concordat of Worms (1122), which ended the Investiture Controversy between the papacy and the emperor, and issued canons against simony, clerical marriage and concubinage, and lay investiture of church offices.

Convoked by

Pope Callixtus II

Canons

22

Catholic Church only (ninth ecumenical council in its numbering).