ings ▁around ▁a ▁door ▁or ▁window . ▁The ▁word ▁" arch it ra ve " ▁is ▁also ▁used ▁to ▁refer ▁more ▁generally ▁to ▁a ▁style ▁of ▁m ould ings ▁( or ▁other ▁elements ) ▁fr aming ▁the ▁top ▁of ▁a ▁door , ▁window ▁or ▁other ▁rect angular ▁opening , ▁where ▁the ▁horizontal ▁" head " ▁cas ing ▁extends ▁across ▁the ▁to ps ▁of ▁the ▁vertical ▁side ▁cas ings ▁where ▁the ▁elements ▁join ▁( form ing ▁a ▁but t ▁joint , ▁as ▁opposed ▁to ▁a ▁mit er ▁joint ). ▁ ▁Class ical ▁architecture ▁ ▁In ▁an ▁ent abl ature ▁in ▁classical ▁architecture , ▁it ▁is ▁the ▁lowest ▁part , ▁below ▁the ▁fr ie ze ▁and ▁cor nice . ▁The ▁word ▁is ▁derived ▁from ▁the ▁Greek ▁and ▁Latin ▁words ▁ar che ▁and ▁tra bs ▁combined ▁together ▁to ▁mean ▁" main ▁beam ". ▁ ▁The ▁arch it ra ve ▁is ▁different ▁in ▁the ▁different ▁Class ical ▁orders . ▁In ▁the ▁T us can ▁order , ▁it ▁only ▁consists ▁of ▁a ▁plain ▁face , ▁crown ed ▁with ▁a ▁fil let , ▁and ▁is ▁half ▁a ▁module ▁in ▁height . ▁In ▁the ▁Dor ic ▁and ▁Compos ite ▁order , ▁it ▁has ▁two ▁faces , ▁or ▁fas cia e , ▁and ▁three ▁in ▁the ▁I onic ▁and ▁Cor inth ian ▁order , ▁in ▁which ▁it ▁is ▁ 1 0 / 1 2 ▁of ▁a ▁module ▁high , ▁though ▁but ▁half ▁a ▁module ▁in ▁the ▁rest . ▁ ▁Met ap hor ical ▁use ▁ ▁The ▁term ▁arch it ra ve