Just about everything about this photo is excellent. The exposure is great and the it is rare to find a more potent subject. It's hard for me to get past the dutch angle, though. I think it really hurts the impact of the photo. It's disorienting, and (as is the case with nearly all dutch angle photos) unnecessary. If this was taken as a vertical, it would've killed two birds with one stone. Firstly, the subject would be MUCH more strongly defined in the center of the photo. As it stands, My eye starts on the building and I don't notice the policeman until later. He should really be the first thing I see. Secondly, it would get rid of the distracting red sign on the left. To summarize, I really think this photo is JUST short of amazing, due to those things. It would've been one of the best street shots I've ever seen.
This is a great shot, I love the dynamic angle and the white around the building makes it really jump out at you, and the dark blue sky at the top of the building accentuates how high up the builing is (as the sky gets darker the higher your altitude, if you were going up to space).
I disagree with the critique regarding the policeman, he was not one of the last things I saw. Personally, I followed the line of the top of the buling with the red sign down to the policeman, then moved up the length of the building.