Note:  Do not rely on this information. It is very old.


Clerestory (more properly clearstory), a term used in architecture, and especially in ecclesiastical architecture, to denote an upper storey with windows by which the centre of a building is lighted. In some churches the clerestory rises immediately above the aisles, in others the triforium, called also the blind-storey, from the fact of its having no windows, comes between.