The Lateran councils were ecclesiastical councils or synods of the Catholic Church held at Rome in the Lateran Palace next to the Lateran Basilica. Ranking as a papal cathedral, this became a much-favored place of assembly for ecclesiastical councils both in antiquity (313, 487) and more especially during the Middle Ages.[1]
The Third Council of the Lateran (1179) limited papal electees to the cardinals alone, condemned simony, and forbade the promotion of anyone to the episcopate before the age of thirty.