Despite the fact that Rome is home to the Vatican City and St. Peter's Basilica, Rome's cathedral is the Archbasilica of Saint John Lateran, in the south-east of the city centre. There are around 900 churches in Rome in total. Aside from the cathedral itself, some others of note include the Basilica di Santa Maria Maggiore, the Basilica of Saint Paul Outside the Walls, the Basilica di San Clemente, San Carlo alle Quattro Fontane and the Church of the Gesù. There are also the ancient Catacombs of Rome underneath the city. Numerous highly important religious educational institutions are also in Rome, such as the Pontifical Lateran University, Pontifical Biblical Institute, Pontifical Gregorian University, and Pontifical Oriental Institute.