If water is the soul of Venice, St. Mark's Church is the essence of Venice. Founded more than 1000 years ago, the church was named after the burial of Saint Mark, the evil saint. It was once the largest church in medieval Europe. It combines the characteristics of eastern and Western architectural art, including Byzantine art, ancient Roman architecture and Italian architectural style. The interior of the church is covered with gold foil mosaic murals, which are brilliant, so it is also known as the Golden Cathedral. Unfortunately, the interior is not allowed to take photos.