Pablo,
This is a remarkable picture. There's a strong oblique T-form to this. This consists of a powerful pink red brick mass of interesting buildings coming in obliquely from the left meeting an intermediate curve traversing the mid-zone and then behind that a magnificent spread of architecture making the skyline.
The sky is complex. From the lower left of the sky sweeping behind the massive skyline buildings are billowing clouds with great dimensionality. However, the rest of the sky is flat. This could be the exposure but rather I'd wager that the sky is just that complex and might need to be processed in several zones in order to preserve the detail and substance of the clouds which are now so flat.
i hope you have more like this and tell me this was taken in RAW!!
Asher