Algeria; The People's Democratic Republic of Algeria is a North African country on the Mediterranean coast. Algeria is Africa's largest country, covering an area of nearly 2.5 million square miles. Algeria is the tenth-largest country in the world and the largest in Africa and in the Mediterranean. The country is bordered in the northeast by Tunisia, in the east by Libya, in the west by Morocco, in the southwest by Western Sahara, Mauritania, and Mali, in the southeast by Niger, and in the north by the Mediterranean Sea. Its capital and the most populous city are Algiers. Algeria was the home of many ancient prehistoric cultures, including Aterian and Capsian cultures. Its area has known many empires and dynasties, including ancient Berber Numidians, Carthaginians, Romans, Vandals, Byzantines, Arab Umayyads, Berber Fatimids, Berber Almoravids, Berber Almohads, and later Turkish Ottomans.