The lateran Basilica, built by the Emperor Constantine on the Lateran Hill around the year 320, is the cathedral of the Pope who is Bishop of Rome. This Basilica, dedicated to the saviour, to Saint John the Baptist and Saint John the Evangelist, is considered the mother of all the churches. The feast of its dedication reminds us of our calling to live in deep communion with the successor of Peter, the rock on which Jesus built his church and the one who confirms us in our faith.