1322-1342
Ely, England

An octagon symbolically standing for the 8th day: time beyond our time on Earth. The choir sat beneath (original location). The steep pointed arches, lancet windows, and elaborate painted and stained glass decoration.

https://www.elycathedral.org/history-heritage/a-descriptive-tour-of-ely-cathedral
Ely Cathedral, interior, windows and vaulting of lantern. 1322-1342, 19thc. CE. Artstor, library.artstor.org/asset/ASJAMES_10313510686