'''Aden''' ( ,  ;  '''' Yemeni: ) is a city, and since 2015, the temporary capital of Yemen, near the eastern approach to the Red Sea (the Gulf of Aden), some  east of the strait Bab-el-Mandeb. Its population is approximately 800,000 people. Aden's natural harbour lies in the crater of a dormant volcano, which now forms a peninsula joined to the mainland by a low isthmus. This harbour, Front Bay, was first used by the ancient Kingdom of Awsan between the 7th to 5th centuries BC. The modern harbour is on the other side of the peninsula. Aden gives its name to the Gulf of Aden.