Time to Dismount
I’ve been told that the chains looped across the upper part of the doorway are just for that: preventing anyone on horsebackfrom entering the grounds of the mosque:
Dismount here, please.
You wouldn’t want to ride toward Istanbul‘s Blue Mosque(Mosque of Sultan Ahmet I) in any case, because the architect designed it to be most beautiful when approached on foot.
You’ll see what I mean when you travel to Turkey, but in the meantime, take a look at my pictures showing The Magic of the Blue Mosque.