Saint Mark's Basilica in Venice, Italy served important civic and religious functions throughout its history. Originally a private chapel for the Doge, it became Venice's state church in the 13th century and hosted major state ceremonies. Even after Venice became part of Italy, the basilica continued to serve as an important religious site under the local bishop. Its opulent design also earned it the nickname "Church of Gold" in the 11th century, making it a prime example of Italo-Byzantine architecture and an historically and culturally significant building in Venice.