Venetians are not just Venetians but are also defined as being from the sestiere—the six divisions of the historic centre—they were born or live in. The sestieri form the city centre and don’t include the islands and mainland areas of the city. A castelàn is a person who from the sestiere of Castèlo (Castello in its Italianized form). Today Castello is considered one of the most authentic parts of Venice and is still largely residential. However, as we shall see, there are many famous buildings and museums in the sestiere.