Angola is a Southern African nation whose varied terrain encompasses tropical Atlantic beaches, a labyrinthine system of rivers and Sub-Saharan desert that extends across the border into Namibia. The country's colonial history is reflected in its Portuguese-influenced cuisine and its landmarks including Fortaleza de São Miguel, a fortress built by the Portuguese in 1576 to defend the capital, Luanda. The three dominant ethnic groups are the Ovimbundu, Mbundu (better called Ambundu, speaking Kimbundu) and the Bakongo. There are also small numbers of Mestiço (mixed African and European descent) and ethnic white Europeans as well. The foreign language most commonly learned by Angolans is English, but among the Bakongo (in the Northwest and Cabinda) French is often more important. English will soon be a required subject in Angolan schools. French was previously widely offered as an elective. Romani is spoken by the Angolan Romani minority.