In 1481, King John II of Portugal commissioned Diogo de Azambuja to build the Elmina Castle, which was completed in three years. By 1598, the Dutch had joined the Portuguese in the gold trade, establishing the Dutch Gold Coast (Nederlandse Bezittingen ter Kuste van Guinea) and building forts at Fort Komenda and Kormantsi. In 1617, the Dutch captured the Olnini Castle from the Portuguese, and Axim in 1642 (Fort St Anthony).