3.9K views · 162 reactions | Caisson, a sunken panel inside a ceiling, is a type of dome-shaped ceiling. It is generally used in buildings such as palaces, altars, temples and opera stages. The ceiling of ordinary houses does not use caisson. In the Ming and Qing dynasties, caissons generally had three layers: The lower layer was a square well, the middle layer an octagonal well, and the upper layer a circular well. #ChineseCulture #architecture | Xi's Moments | Facebook