São Jorge Castle is a historic castle in the Portuguese capital of Lisbon, located in the freguesia of Santa Maria Maior. The hill on which São Jorge Castle stands has played an important part in the history of Lisbon, having served as the location of fortifications occupied successively by Phoenicians, Carthaginians, Romans, and Moors, before its conquest by the Portuguese in the 1147 Siege of Lisbon. 

Since the 12th century, the castle has variously served as a royal palace, a military barracks, home of the Torre do Tombo National Archive, and now as a national monument and museum.

The castle is in the centre of Lisbon, on a hill, while many of its walls extend around the citadel into the civil parishes that surround it to the east and south.

- Wikipedia