Nope, you're both right- it is in Nice, built around 1912 by the Tsar Nicholas II. My shot was a rear view, taken from the steps of the tomb. I haven't processed many of the front yet due to other commitments. It's a fantastic place, and well worth a visit. We bought the 72-hour grande tour tickets, which entitled us to unlimited travel on the open-top tour bus which went round Nice and the surrounding area; and it also included free entry to a lot of museums - and Marineland, down at Antibes.
You've obviously found it on google maps, so I probably don't need to put up another shot - although this one: http://flic.kr/p/9yRqoj
has been surprisingly popular on flickr considering that it was taken with a retro camera app on my mobile!
Over to you Ian