Venice can be divided into outer islands and main islands, and outer islands such as Mester are cheap but far from attractions. Most historical and cultural relics and attractions are concentrated on the main island established on the lake, which is the broad historical and cultural area. The main island is divided into Sao Paulo and other districts, the narrow historical and cultural center mainly refers to the Governor's Palace, the area where St. Mark's Square is located. Historically and now, it is the most prosperous place in Venice.