I really love the image itself, and you've probably already got other comments on this, but that border, I think it really takes away from it's beauty.
I bet that you've had plenty of 'circle' comments. The lines in the foreground don't really seem to lead to any one specific point of interest, but I like the look of it anyway.
Wow! What an INTERESTING, striking photo. I love the composition -- with the picture showing through the circle. The picture is so sharp, and the colors are so appealing! I just love this picture.
as you might have gotten already...the border is a bit distracting. i'm guessing you were going for sort of looking out the ramparts but i'm not sure it worked. otherwise the lines of the structure are very pleasing. there could be a bit more contrast for my liking.