The Papal Basilica of St. John Lateran, known as San Giovanni in Laterano, is the cathedral church of the Pope and the official ecclesiastical seat of the Bishop of Rome. Located in Rome, it is the oldest and ranks first among the four major basilicas in the city. The basilica was originally built in the 4th century and has undergone several renovations over the centuries. St. John Lateran is renowned for its stunning architecture and rich history. It features beautiful frescoes, intricate sculptures, and a grand façade. The basilica also houses important relics, including the remains of Saint John the Baptist and Saint John the Evangelist.