(Kilwa Kilwasani)
I think this might be it. The reconstruction is a little odd, and it's certainly not a perfect match, but it appears to be trying to have the little fort, the mosque and the palace. It's far from certain, but I don't know what else it could possibly be at this stage.
Spoiler :

Like what? For me, the face is very intuitive. As soon as I saw the screenshot, I instantly knew that the city must have some of type of person/leader in it, and I instinctively thought "governor". Another icon would probably be less intuitive and would require the player to learn the new symbol.
I don't know, I just find it a little goofy.