I would let the camera autoexposure (in A mode) for the building. As it will be dark (I'm guessing), it will be a relatively longer exposure. This will cause the lit windows to overexposure, possibly a lot. So take another exposure just for the windows, you'll probably have to do this manually, by using exposure compensation (or use manual mode).
So you should end up with two photos. The main photo, of the building.....and another darker exposure just for the windows. You can then blend the two later on.
Forget exposure bracketing, I would just use exposure compensation (but you can do the same thing with bracketing).
GBH14 - Exposure bracketing is a way of taking a series of photos of different exposures, normally either side of the normal exposure (so one darker and one brighter). So for example, you could exposure bracket for 1 stop either side. So the camera would take three photos, one at normal exposure, one 1 stop under and one 1 stop over.
It's quite common to use this when doing HDR photos, as you capture photos preserving highlight details and shadow details. Have a google, as it's easier to see with images.
Brazo - it's the new X100 camera. An upgraded 'S' model. More MP, better AF, improved this...more of that....the usual!