The Basilica di San Giovanni is one of the oldest and most important churches in Rome, Italy. Officially known as the Basilica di San Giovanni in Laterano, it serves as the cathedral of the Pope and the seat of the Archdiocese of Rome. The basilica was originally built in the 4th century and has undergone several renovations over the centuries, showcasing a mix of architectural styles. The basilica is renowned for its stunning interior, which features beautiful mosaics, intricate sculptures, and a grand altar. It also houses important relics, including the remains of Saint John the Baptist. As a major pilgrimage site, it attracts visitors from around the world who come to admire its historical and spiritual significance.