The Basilica of San Clemente al Laterano is a historic church located in Rome, Italy. It is dedicated to Saint Clement, the third pope and a martyr. The basilica is notable for its unique three-tiered structure, which includes a 12th-century church built over a 4th-century church, and beneath that, a 1st-century Roman house. Visitors can admire its stunning mosaics, frescoes, and the intricate design of the interior. The basilica serves as an important example of early Christian architecture and reflects the rich history of the Christian Church in Rome.