Second Lateran Council

Timeline

1. 1139Lateran Palace · RomeWith the military support of Holy Roman Emperor Lothair III, Innocent II convened about a thousand bishops in April 1139. Antipope Anacletus II had died in 1138, and his successor Victor IV quickly abdicated; the council formally declared the papal schism ended and confirmed Innocent II's lawful position.
2. 1139Lateran Palace · RomeThe council excommunicated Roger II for having supported the antipope and declared his Sicilian crown invalid. It also passed about thirty canons covering clerical celibacy, the prohibition of simony, restrictions on carrying weapons, and other disciplinary reforms, laying the groundwork for later codification of canon law.