Sanaa, also spelled Sanaʽa or Sana, is the largest city in Yemen and the centre of Sanaa Governorate. The city is not part of the Governorate, but forms the separate administrative district of "Amanat Al-Asemah". Under the Yemeni constitution, Sanaʽa is the capital of the country, although the seat of the Yemeni government moved to Aden, the former capital of South Yemen in the aftermath of the Houthi occupation. Aden was declared as the temporary capital by President Abdrabbuh Mansur Hadi in March 2015.
At an elevation of 2,300 metres, Sanaa is one of the highest capital cities in the world and is next to the Sarawat Mountains of Jabal An-Nabi Shu'ayb and Jabal Tiyal, considered to be the highest mountains in the country and amongst the highest in the region. Sanaa has a population of approximately 3,937,500, making it Yemen's largest city. As of 2020, the greater Sanaa urban area makes up about 10% of Yemen's total population.
The Old City of Sanaa, a UNESCO World Heritage Site, has a distinctive architectural character, most notably expressed in its multi-storey buildings decorated with geometric patterns.