a not-so-octagonal foyer

I’ll be featuring the rest of the house from which this small detail stems tomorrow, but here’s a small tidbit – a foyer or entry hall that is not quite a true octagon, due to the geometries at play in the larger plan.  Different ceiling options follow, where the first attempts to regulate the whole in a ribbed ‘melon’ dome, the second highlights the four cardinal direction in a circular vault, and the third treats those as flat panels.