Editing Mullion (section)

==History==
Stone mullions were used in [[Armenian architecture|Armenian]], [[Anglo-Saxon architecture|Saxon]] and [[Islamic architecture]] prior to the 10th century.  They became a common and fashionable architectural feature across Europe in [[Romanesque architecture]], with paired windows divided by a mullion, set beneath a single arch. The same structural form was used for open arcades as well as windows, and is found in galleries and cloisters.

In [[Gothic architecture]], windows became larger and arrangements of multiple mullions and openings were used, both for structure and ornament. This is particularly the case in [[Gothic cathedrals and churches]] where [[stained glass]] was set in lead and ferramenta between the stone mullions. Mullioned windows of a simpler form continued to be used into the [[Renaissance]] and various [[Anglo-Saxon architecture|Revival styles]]. Italian windows with a single mullion, dividing the window into two equal elements are said to be biforate, or to parallel the Italian [[Bifora (architecture)|bifore]] windows.<ref>{{Cite web|title=Biforate window |work=Oxford Reference|url=http://www.oxfordreference.com/view/10.1093/oi/authority.20110803095504957?rskey=2OcdPs&result=1}}</ref>