The Duke's palace is located on the waterfront in the old town centre of Šibenik. Only two wings of this big building have been preserved. The highest representative of Venetian state authority in the community was seated here. That was the town duke – captain. Gothic passage with the town gate passes through the central line of the ground-floor. The town coat-of-arms with the figure of St. Michael – the patron of the town – is above the town gate.
The west wing of the Duke's palace is turned towards the sacristy and apse parts of the cathedral. Two doors with simple stone frames are on the south end of this part, and a niche with the Baroque sculpture of a man is between them. In 1975 the adaptation of the Duke's palace for the Town Museum of Šibenik was completed.