Saint George's Castle
Saint George Castle is a historic castle in the Portuguese capital of Lisbon.
Although the first fortifications on this hilltop date from the 1st century BC, archaeological excavations have identified a human presence in the Tagus valley as far back as the 8th century BC. The first fortification was, presumably, erected in 48 BC, when Lisbon was classified as a Roman municipality.
Since the 12th century, the castle has variously served as a royal palace, a military barracks, home of the National Archive, and now as a national monument and museum.