St. Mark's Basilica is a famous cathedral located in Venice, Italy. Known for its stunning architecture, it features a blend of Byzantine, Romanesque, and Gothic styles. The basilica is adorned with intricate mosaics that depict biblical scenes, making it a significant example of Christian art. The basilica was originally built in the 9th century to house the relics of St. Mark, the patron saint of Venice. Over the centuries, it has undergone several renovations and expansions, enhancing its grandeur. Today, it stands as a symbol of the city's rich history and cultural heritage, attracting millions of visitors each year.