Saint John Lateran is the oldest and highest-ranking basilica in the Catholic Church. Officially known as the Archbasilica of the Most Holy Savior and Saints John the Baptist and John the Evangelist, it serves as the cathedral of the Pope and the seat of the Bishop of Rome. Located in Rome, Italy, it was originally built in the 4th century and has undergone several renovations over the centuries. The basilica is renowned for its stunning architecture, beautiful frescoes, and significant religious artifacts, making it a major pilgrimage site for Catholics worldwide.