Mullion
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A mullion is the element that forms a division between units of a window or screen, or is used decoratively. When dividing adjacent window units its primary purpose is a rigid support to the glazing o
A mullioned window in the church of San Francesco of Lodi, Lombardy
Transom (architecture)
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In architecture, a transom is a transverse horizontal structural beam or bar, or a crosspiece separating a door from a window above it. Transom or transom window is also the customary U.S. word used f
Mullion
…structural support to the horizontal lintel above the window opening (Horizontal elements separating the head of a door from a window above are called transoms). In the case of multiple arched windows combined building a bifora (or trifora, etc), the equally shaped windows might be coupled by mullions (instead…
Door of 10 Downing Street, London, showing a transom separating the door from the fanlight window above
A ranma found in Kōchi Castle designed to look like a wave