Fortress of Mazagan is a fortified citadel located in the city of El Jadida in Morocco. It was built by Portuguese in 1514 AD, and then expanded in 1541. The citadel came under Moroccan control in 1769, and several years later, Sultan Abd al-Rahman of Morocco ordered the construction of a mosque and the rebuilding of the destroyed parts of the citadel. The Fortress of Mazagan was inscribed as a UNESCO World Heritage Site in 2004 as part of Portuguese City of Mazagan (El Jadida).