The Alcázar of Seville is a royal palace in Seville, Spain, originally a Moorish fort. It is the oldest royal palace still in use in Europe, and it was registered in 1987 by UNESCO as a World Heritage Site, along with the Seville Cathedral and the General Archive of the Indies.
The Almohades were the first to build a palace, which was called Al-Muwarak, on the site of the modern day Alcázar. The palace is one of the best remaining examples of mudéjar architecture. Subsequent monarchs have added their own additions to the Alcázar. The upper levels of the Alcázar are still used by the royal family as the official Seville residence and are administered by the Patrimonio Nacional.