The Old City of Sana'a (with over 2.000 years of history) presents an unique homogeneous architectural ensemble. The design and detail of each of the houses combine into an integral beauty. Sana’a is also connected to the spread of Islam in the early years of the Hegira (from 628). Surrounded by ancient clay walls which stand 6–9 metres (20–30 ft) high, the old city boasts over 100 mosques, 12 hammams (baths) and 6,500 houses. Many of the houses resemble ancient skyscrapers, reach