Editing Romanesque architecture (section)

====Groin vault====
[[Groin vault]]s occur in early Romanesque buildings, notably at [[Speyer Cathedral]] where the high vault of about 1060 is the first employment in Romanesque architecture of this type of vault for a wide nave.<ref name=Toman/> In later buildings employing ribbed vaultings, groin vaults are most frequently used for the less visible and smaller vaults, particularly in crypts and aisles. A groin vault is almost always square in plan and is constructed of two barrel vaults intersecting at right angles. Unlike a ribbed vault, the entire arch is a structural member. Groin vaults are frequently separated by [[transverse arch]]ed ribs of low profile as at Speyer and [[Santiago de Compostela]]. At [[Vézelay Abbey|Sainte Marie Madeleine, Vézelay]], the ribs are square in section, strongly projecting and polychrome.<ref name=NP>Nikolaus Pevsner, ''An Outline of European Architecture''</ref>