As it happens, this is a photo I took a few weeks ago while on holiday, at a moment when I was filled with conscious contentment!
Precisely, I'm lying/sitting on an outdoor bench/seat/shape (they really don't have proper backs, but are moulded for lounging), in soft autumn sun, next to a whole bunch of cafes and museums in Vienna's Museumsquartier. And I have a book. Ergo, contentment.
And this is the kitchen at the abbey of Fontevraud. An octagon on the floor and walls, then a square for the immediate ceiling, and lastly an octagon for the chimney/roof.