Elmina Castle was erected by Portuguese in 1482 as São Jorge da Mina (St. George of the Mine) Castle, also known simply as Mina or Feitoria da Mina) in present-day Elmina, Ghana (formerly the Gold Coast). It was the first trading post built on the Gulf of Guinea, so is the oldest European building in existence below the Sahara. First established as a trade settlement, the castle later became one of the most important stops on the route of the Atlantic slave trade.