Sanaa, also spelled San'a' or Sana, is a governorate of Yemen. Its capital is Sanaa, which is also the national capital. However, the city of Sanaa is not part of the governorate but instead forms the separate governorate of Amanat Al-Asemah. The Governorate covers an area of 13,850 km² (5,350 sq mi). As of 2004, the population was 2,918,379 inhabitants. Within this place is Jabal An-Nabi Shu'ayb or Jabal Hadhur, the highest mountain in the nation and the Arabian Peninsula.