Gibralfaro has been the site of fortifications since the Phoenician foundation of Málaga city, circa 770 BC. The location was fortified by Calif Abd-al-Rahman III in 929CE. At the beginning of the 14th century, Yusuf I of the Kingdom of Granada expanded the fortifications within the Phoenician lighthouse enclosure and erected a double wall to the Alcazaba. The name is said to be derived from Arabic, Jbel, rock or mount, and Greek the word for light, Jbel-Faro, meaning "Rock of Light". The castle is famous for its three-month siege in 1487 by the Catholic monarchs, King Ferdinand and Queen Isabella, which ended when hunger forced the Arabs to surrender.