San Marco is a church located in the center of Rome, Italy. It was built in the 4th century and was later reconstructed in the 13th century. The church is famous for its beautiful mosaics and its unique blend of architectural styles, which include both Romanesque and Byzantine elements.

San Marco is also known for its historic association with the Dominican Order, which has a strong presence in Rome. The church contains a number of important religious relics, including the tomb of St. Catherine of Siena and the body of St. Pius V.

San Marco is a wonderful example of the beauty and richness of Rome's artistic heritage. Visitors can admire the impressive basilica and its collection of mosaics, sculptures, and paintings. The church has a peaceful and serene atmosphere that offers a break from the bustling city outside. Its location is also convenient for exploring other nearby attractions, such as the Piazza Venezia and the Colosseum. Overall, San Marco is a must-visit destination for art and history enthusiasts looking to discover the treasures of Rome.