Venice is located in northeast Italy and is divided into six districts. It is built on islands in a lagoon and has a rich history as a powerful maritime republic dating back to the 5th century. Today, Venice attracts many tourists due to its ancient architecture and waterways, though rising sea levels threaten the city. The population is around 270,000 people, primarily Italian. Transportation within Venice is mainly by water taxi, waterbus, or walking bridges since most roads are canals.