As best as I can tell this is the The Mother Church of the Church of Christ, Scientist. (Pardon if I've messed up this title. I've have no knowledge of the Church - I just love this grand architecture.) I do know it's in Boston.
I shot this about 5:15 in the morning. Actually I shot 5 frames at 2/3 stops apart and ran them through PS CS2's HDR Merge. The images were shot with the 17-40 L @ 17mm, so there were some perspective issues which I cleaned up using CS2's Len Correction filter. I then ran some Shadow & Highlights, added some saturation, resized and sharpened.
In you're interested you can see some more info & comparisons on HDR software in this thread, which also includes the original "unprocessed" image. More info and comparisons about perspective correction can be found in this thread.
This was shortly at 6:45 AM shortly before sunrise. (I had a grand old time in this plaza.) 6 shots run through HDR Merge, but shot at 32mm so no real need for perspective correction. Very little processing afterwards, but resized and sharpened.