<human>:  When was the Doge’s Palace in Castello, Venice built?
<bot>: The Doge’s Palace was built between 1404 and 1424. It was built as a symbol of power and prestige for the Doge of Venice, a position that was inherited from the Roman emperors. The Doge of Venice was the head of state of Venice and was elected by the people. The palace was built in the Gothic style, with a characteristic exterior of white marble and black and white brick.