The Doge's Palace, Palazzo Ducale

The Doge's Palace (Italian: Palazzo Ducale) is a palace built in Venetian Gothic style, and one of the main landmarks of the city of Venice in northern Italy. The palace was the residence of the Doge of Venice, the supreme authority of the former Venetian Republic. It was founded in 1340, and extended and modified in the following centuries. It became a museum in 1923, and is one of the 11 museums run by the Fondazione Musei Civici di Venezia. 

Source: palazzoducale.visitmuve.it