
Architects work on renovating historical buildings in Old Sanaa City, Yemen, on July 5, 2022. The old city of Sanaa was inscribed on the World Heritage List of the UNESCO in 1986. The old city has been inhabited for more than 2,500 years. The 6,000 mud-brick tower houses are decorated with geometric patterns of white plaster and stained glass windows. Photo:Xinhua

An architect works on renovating historical buildings in Old Sanaa City, Yemen, on July 6, 2022. The old city of Sanaa was inscribed on the World Heritage List of the UNESCO in 1986. The old city has been inhabited for more than 2,500 years. The 6,000 mud-brick tower houses are decorated with geometric patterns of white plaster and stained glass windows. Photo:Xinhua

A worker renovates the facade of a house in Old Sanaa City, Yemen, on July 6, 2022. The old city of Sanaa was inscribed on the World Heritage List of the UNESCO in 1986. The old city has been inhabited for more than 2,500 years. The 6,000 mud-brick tower houses are decorated with geometric patterns of white plaster and stained glass windows. Photo:Xinhua

Architects work on renovating historical buildings in Old Sanaa City, Yemen, on July 5, 2022. The old city of Sanaa was inscribed on the World Heritage List of the UNESCO in 1986. The old city has been inhabited for more than 2,500 years. The 6,000 mud-brick tower houses are decorated with geometric patterns of white plaster and stained glass windows. Photo:Xinhua

A worker renovates the facade of a house in Old Sanaa City, Yemen, on July 5, 2022. The old city of Sanaa was inscribed on the World Heritage List of the UNESCO in 1986. The old city has been inhabited for more than 2,500 years. The 6,000 mud-brick tower houses are decorated with geometric patterns of white plaster and stained glass windows. Photo:Xinhua