Lerma Ducal Palace was created in 1617.
Yes, Its a palace where a Duke lives!
The Bridge of Sighs in Venice was built in 1602 to link the new prison (at the time) to the facade of the Ducal Palace.
The Palazzo Ducale (Ducal Palace) is in the city of Mantua NOT to be confused with The Palace of the Doges of Genoa ("Palazzo Ducale" in Italian)
Duke's Castle also known as the Ducal Castle, is located in Szczecin, Poland.
Ducal Georgianum was created in 1494.
Stefano L'Occaso has written: 'The Ducal Palace of Mantua' -- subject(s): Buildings, structures, Guidebooks, Palazzo ducale (Mantua, Italy)
Peterhof Palace is located in Russia.
The palace of Knossos was located on the island of Crete.
Teatro Regio Ducal was created in 1717.
Grand Ducal Institute was created in 1868.
Grand Ducal Guard was created in 1945.