November 9th is the feast of the Dedication of the Basilica of St. John Lateran in Rome. It marks the dedication, in 324 A.D., of the cathedral church of Rome after Constantine's Edict of Milan granted religious freedom to Christians. It is the oldest and ranks first among the four Papal Basilicas, and is the official ecclesiastical chair of the Bishop of Rome, the Pope. A Latin inscription in the church reads: "Omnium urbis et orbis ecclesiarum mater et caput," translated, "Of all the churches in the city and the world, the mother and head." Its universal celebration is a sign of love for and union with the See of St. Peter, Vicar of Christ.