The Doge's Palace was built upon the site of an old fort after the Venice hierarchy decided to build a new palace. It was designed by Filippo Calendario in Venetian Gothic style. There were two phases to its construction- the eastern wing, which was built between 1301-1340, and the western wing, which took 110 years to build. This was due to designer Filippo Calendario's execution in 1355, which hindered progress on the western wing. The photo is by MarkusMark (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons. It is free to copy and redistribute.