St. Mark's Church is a historic church located in Venice, Italy. It is known for its stunning Byzantine architecture and intricate mosaics that adorn its interior. The church was originally built in the 9th century and has undergone several renovations over the years, making it a significant landmark in the city. The church serves as the cathedral of the Patriarchate of Venice and is dedicated to Saint Mark the Evangelist, the patron saint of Venice. Its iconic façade features five domes and a grand entrance, attracting millions of visitors each year who come to admire its beauty and rich history.