Arch

I have walked through this door in the wall many times, and I like the smooth edges, different colours and the lovely arch.  And the brickwork is in far better condition than the rest of the wall. Specially made bricks.
The other side is less impressive with a rectangular doorframe, presumably added after the majesty of the doorway had faded. You can see part of the wood at the top of the arch.

Another unknown story within a story.