This photograph is of part of a ruined monastery (I think) in Sarlat, a medieval town in the Dordogne.
This week, Cee is looking for images of rocks. You could perhaps argue that these are stones rather than rocks, but what exactly is the difference between a stone and a rock?
Well, according to Wikipedia (so it must be true), stone is rock that’s had a bit of work done on it. Still made of rock though, I’d argue.
Judiciously cropped, as here, it reminded me of something that M C Escher might have produced.