Baroque coffered ceiling of the cupola of S. Carlo alle Quattro Fontane, Rome, designed by —SCALA/Art Reference
In architecture, a square or polygonal ornamental sunken panel used in a series as decoration for a ceiling or vault. Coffers were probably originally formed by wooden beams crossing one another to produce a grid. The earliest surviving examples were made of stone by the ancient Greeks and Romans. Coffering was revived in the Renaissance and was common in Baroque and Neoclassical architecture.