King's College Chapel, Cambridge, UK boasts the world's largest fan-vault. It's construction took almost 100 years and was completed during Henry VIII's reign , The initials H and A above the central doorway refer to Henry and Anne Boleyn
Architecture of UNESCO World Heritage City of Sana’a, Yemen. Sana'a is the capital of Yemen and the center of Sana'a Governorate. The city is not part of the Governorate, but forms the separate administrative district of Amanat Al-Asemah.