Sanaa (Arabic: صَنْعَاء Ṣanʿāʾ), also spelled San'a' or Sana, is a governorate of Yemen. The capital is Sana'a, which is also the national capital. However, the city of Sana'a is not part of the governorate but instead forms the separate governorate of Amanat Al-Asemah. The Governorate covers an area of 13,850 km (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.