St Mark`s Basilica, the cathedral of Venice, is the most famous of the city's churches and one of the best known examples of Byzantine architecture. It lies on St Mark's Square, adjacent and connected to the Doge's Palace and has been the seat of the Patriarch of Venice since 1807. For its opulent design, gilded Byzantine mosaics, and its status as a symbol of Venetian wealth and power from the 11th century on, the building was known by the nickname "church of gold".