Ok, I had to think about this for a while because when I first look at the image it is generally striking and interesting. I appreciate the subject in the first place because it speaks of a time long past and of much history that likely nobody will ever know...
Also I agree with your choice to move from color to BW, though I may also recommend you try one other style...This image may work very well in pseudo-hdr (if you have Photoshop then maybe try this tutorial for an excellent effect [link] ; if you don't have Photoshop then it is very possible you can use the principles of the tutorial in whatever editing application you are using.
Finally, it took me a while to be ready to write this critique because as much as I liked the image, I couldn't put my finger on what was bothering me...now I think I got it...your angle and perspective are great, and while I may have taken 1 step left for the shot, that is personal style; so I think what is missing is depth-of-field...because everything is in focus, our eye tends to try and focus on EVERYTHING, so the wall on the right, as cool as it is, may need some blurring and/or darkening so as to allow the eye to naturally move down to the more ornate architecture in the distance...
It is a beautiful and interesting shot that hints at stories that will never be told; try adding a DOF effect down just 1/3 of the right wall and see if it doesn't relax your eyes into the depths of the image. Also, if you try the pseudo-hdr effect, I sure would love to see it so please notify me!
Uh... This is my first Critique and I just finished a two week photography assignment... So I'm sorry if this fails. And warning, I know nothing about photography (X3)
Vision: I can see it vvery clearly. You can tell it is old and there's some contrast. It's breathtaking.
Originality: It's not the first time I've seen a picture like this, but it's probably the best I've seen.
Technique: I'm impressed by what side you chose and how it's kinda slanted sideways. Like I said, some contrast and prosparity (DIDN'T SPELL IT RIGHT! DARN IT!). And I can kinda see a rule of thirds. Impact: Whatever this means, Overall, it's an amazing photograph. It's beautiful, emotional and breathtaking. I hope I get to see more of these.
Other notes: The black and white look great and I see why you perfered it that wat rather than color.