One thing that you notice as you move through Siena is the number of buildings that represent architectures of old. In this case a building - I wouldn't even attempt to guess how old - is built around a courtyard which at one time had a well in the middle of it.
You can get plenty of sun up on the top floors; on the lower ones less so, I would say.
As a result of the difference I had to duplicate this image and run it through the HDR system.
It was only after processing this that I noticed that the next shot was actually a far better one. What they hey, this one is done now anyway.