Fan vault

A vault built on ribs radiating from the wall supports, such as a cantilever, semi-colum, ancillary column. Ribs are all of the same curve and spaced equidistantly, in a manner resembling a fan. Fan vault appeared in the second half of the fourteenth century, and was most often used in late gothic, so-called perpendicular style, which dominated English architecture in the fifteenth century.

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