The Fourth Council of the Lateran or Lateran IV was convoked by Pope Innocent III in April 1213 and opened at the Lateran Palace in Rome on 11 November 1215. Due to the great length of time between the council's convocation and its meeting, many bishops had the opportunity to attend this council, which is considered by the Catholic Church to be the twelfth ecumenical council.
The council addressed a number of issues, including the sacraments, the role of the laity, the treatment of Jews and heretics, and the organization of the church. The decree mandating annual confession has been called "perhaps the most important legislative act in the history of the church."
In the case of Jews and Muslims, this included compelling them to wear distinctive badges to prevent social contact "through error".
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