Being an earlier riser than the Bomber (isn't everyone? Ed.) when we were in Seville I was out flaneuring of a morning while he was still catching up with his zzzzzz's.
The first day I came out of the Hotel Abonico and turned left. A hundred yards down C. Águilas behind a nondescript door in a blank wall was this:
Whoosh, here becomes now. Britain would look like this if it wasn't for the Reformation. I have checked it out since I am back home. Google Maps says it is the Convento Santa María de Jesús see https://goo.gl/maps/jDcKua8ojc5MteKm7
I can't find anything about it in English, and it isn't in the DK Guide to Seville Helen lent us. Here's a Spanish video.