Ṣan‘ā’ (sometimes spelled Sanaa or Sana'a) is the capital of Yemen and the center of San‘a’ Governorate. It is Yemen's largest city. San‘a’ is located at and has a population of 1,747,627 (2004 census). Geography San‘a’ lies in the heart of Yemeni highlands on a plateau at an altitude of surrounded by several mountains, notably Jabal Nuqum and Aiban. It has a cool and dry climate and in the winter time light frost is possible.… (More on Sanaa)