A few of the tracing boards in Cayers Maçonniques have a “window […] amidst clouds” like here on the tracing board of “Maitre Anglais par Curiocité” (‘English Master by curiosity’). Later an explanation follows:
My brother, the window you observe in these clouds represents the vault of the Temple of Solomon.
Cayers Maçonniques (National Library of Australia, MS 1097/44)