The name of the island (, pronounced ) is derived from Ali Musa Mbiki (Mussa Bin Bique), sultan of the island in the times of Vasco da Gama. This name was subsequently taken to the mainland country which is modern-day Mozambique, and the island was renamed "Ilha de Moçambique" (Island of Mozambique). The Portuguese established a port and naval base in 1507 and built the Chapel of Nossa Senhora de Baluarte in 1522, now considered the oldest European building in the Southern Hemisphere.