Illustrated Dictionary of British Churches - Mullion Definition
History and Architecture
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- Lancet
- Lectern
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- Triforium
- Tympanum
- Undercroft
- Vaulting
- Victorian Gothic
- Wall Monument
- Wall Painting
- Wheel Window
Mullion
A vertical dividing strip, usually of stone, in a church window. Mullions divide the separate 'lights', or narrow vertical panels of glass, that make up the entire window. So, obviously, there are always one less mullion than there are lights in a window (i.e. a two light window will have one mullion up the middle, a three light window will have a pair of mullions, and so on).