Bay (architecture)
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In architecture, a bay is the space between architectural elements, or a recess or compartment. The term bay comes from Old French baie, meaning an opening or hole.
Lyme Park in Cheshire, England. The main facade is divided by pilasters into fifteen bays, equalling the number of windows.
Looking down the central aisle of the Saint Roch Parish Church of Lemery, Batangas, Philippines, the spaces between each set of columns and roof trusses are bays.
An interior bay, between the supports of the vaults, in Lyon Cathedral, France
Rib vault
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A rib vault or ribbed vault is an architectural feature for covering a wide space, such as a church nave, composed of a framework of crossed or diagonal arched ribs. Variations were used in Roman arch
Romanesque rib vaulting, Peterborough Cathedral (begun 1118) south aisle
Gothic rib vaulting, Tours Cathedral, nave
Rib vaulted ceiling of Noyon Cathedral, one of the first Gothic cathedrals built in France
Rib vault from Villa Sette Bassi, Rome (c.150)