I agree with Lydia, This image is missing atmospheric perspective. I took your painting and cooled off the colors and edges in the background, warmed up the colors in the foreground. Notice how it pushes the city in the background back and helps give perspective? As a side point, the tower to the right in the background is out of perspective. For the most part, your perspective looks pretty good. I hope this helps :)

One thing you could do is darken the values in the arches and under the bridge for more contrast. Those beautiful arches don't pop the way I think you maybe want them too, so darkening all of those interesting shadow shapes would add some ever important contrast! You may also consider adding darker values in those rocks on the left, and also maybe add a foreground element off to the right. Great work!

I think you did really well on the overall weight of the image and also edge control, so there's nothing really problematic in composition. (Unless you have some reference images we could look at and see where you are headed, then it's easier to spot problems) If I must say what can be improved, I think it would be the background city, especially those inside the arch, it's too busy there and lack of separation with the arch, so it appears to be a bit muddled. Otherwise I'd say good job!

I agree with everything @Lydia Chase says. It would benefit greatly from the addition of atmosphere. I feel that it's lacking a clear focal point. What are I supposed to be looking at? Everything is beautifully rendered but as a viewer I want some kind of narrative. The addition of a character looking over the rubble would be amazing. Regardless of my opinion though. What you have is really awesome! Keep it up!

Hi! I really like the direction this is heading, your handle on light and shadow make this piece fascinating to look at. I think by pushing the lighting and atmosphere, almost exaggerating, could help the composition and design. Regarding the composition, I think defining the edge between the foreground and background would be helpful. Maybe adding more atmosphere between the viewer and the town in the background could create contrast between the foreground, and would add to the vastness of the town. Adding some high saturation highlights on the slabs of stone in the sunlight would make the foreground sparkle and glow! I hope those ideas help!