Talk about epic!

it's incredibly complex up close, a bit confusing to the eyes at first. But from far away, it all starts to blend together. It still seems a little too busy though, you might consider toning it down a bit where the arch curves begin, and enlarge some of the prominent features of the arch to draw attention to the center and ease the eyeballs; the outer parts of the wall could remain busy, but as it comes to the arch, making it simpler will literally draw a person in from afar, like a focus point on a painting.

Of course, that could just be the pictures provided, perhaps more shots from above? Hope my two cents help!

Either way, great job on the build. Putting a city behind it eventually?

Great work, dude!  I love it!  :D