If there's one thing I know...

It's that this bab (gate, door, etc) is in some way distinctly Andalusian/Maghrebi (Moroccan/West African). Those aren't quite the same thing but are really similar because of all the interaction the two regions had. I think it has something to do with the curved top and possibly the Arabic writing above it.

(This post is funny only to me because we've looked at lots of babs and been told how they're similar architecturally, but I've really never understood it. Instead I just sort of nod and smile and people think I know what I'm talking about).