Situated on the outskirts of ancient Rome along the still-visible Aurelian Walls is the Archbasilica of St. John Lateran, the cathedral of Rome. The site of the pope's residence for nearly 1,000 years, five of the church's ecumenical councils, and the signing of a pivotal 1929 treaty between Italy and the Holy See, St. John Lateran is celebrated by the whole church annually with the Nov. 9 feast of its dedication.