Four-centred arch
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A four-centred arch or four-centered arch is a low, wide type of arch with a pointed apex. Its structure is achieved by drafting two arcs which rise steeply from each springing point on a small radius
Tudor arch at Layer Marney Tower, 1520s
Persian arches on the Si-o-se-pol bridge, Isfahan, c. 1600
The 17th century Buland Darwaza at Fatehpur Sikri has a four-centred archway with vaulted iwan.
Restored 9th century arches of the Qasr al-'Ashiq, Samarra.
Pendant vault
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Pendant vaulting is a form of Gothic vaulting in which large decorative pendants hang from the vault at a distance from the walls. In some cases, the pendants are a large form of boss. It is particula
Pendant fan vault of Henry VII's chapel at Westminster Abbey.
The reverse of the vault at Henry VII's Chapel, showing the concealed arches, drawn by Robert Willis.
Christchurch Priory: the pendants hardly project from the vaults and are very close to the walls.
Pendant fan vault over the Dean's Chapel, Warwick