As an ex-stone cutter myself (mostly of domestic openings), I am always attracted to similar work that was done by the generations before me; especially bits and pieces around the immediate area where I live.
This small opening above is curious. I imagine it started life as a bigger lump of stone with a complete hole, and at some time it broke. Some inventive stone cutter then came along and cut an amusing small lintel for it, and it's useful life was extended. Personally I would have completed the circle in the new lintel, but I do find his solution quite fun.
This one is in a side wall at my baker's. A very decorative small opening with (like the one above) a square modern window set in behind it. I can't help thinking that it was a shame that a larger piece of plain glass wasn't set into the interior wall to take better advantage of the light.
The two small openings are opposite each other in a tiny side street.
I wonder what people in centuries to come will be saying about stuff that I cut?