San Clemente al Laterano is a historic basilica located in Rome, Italy. It is dedicated to Saint Clement, the third pope and a martyr of the early Christian church. The church is known for its beautiful mosaics and intricate architecture, showcasing various styles from different periods, including early Christian and medieval elements. The basilica is built on three levels, with the current structure dating back to the 12th century. Beneath it lies an ancient Roman house and a 4th-century church, which can be explored by visitors. San Clemente al Laterano serves as a significant site for both religious worship and historical exploration.