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.
Perpendicular Gothic
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Perpendicular Gothic architecture was the third and final style of English Gothic architecture developed in the Kingdom of England during the Late Middle Ages, typified by large windows, four-centred
Four-centred arch
…produces a grid-like appearance of regular, delicate, rectangular forms with an emphasis on the perpendicular, characteristic of the style, known as Perpendicular Gothic in England, of the 15th and early 16th centuries. This is very similar to contemporary Spanish style in particular. In buildings such as Hampton Court…
King's College Chapel, Cambridge, Great East Window (four-centred arch, straight mullions and transoms)
The chancel of Gloucester Cathedral (c. 1337–1357)
Chapter house by William de Ramsey (c. 1332) at Old St Paul's Cathedral (by Wenceslaus Hollar); destroyed in the Great Fire of London in 1666
Four-centred arch west window of St George's Chapel, Windsor Castle