This was taken at Durbar Court, at the heart of the India Office as part of the Open House London 2011 event. The India Office is part of the Foreign and Commonwealth Office estate at Whitehall, London.
I have to say this was a complete nightmare to line up. The moment I got one bit lined up I messed it up trying to get the next bit to work. Fuzzy eyes at the end of it! I think this works much better at the angle rather than the more traditional straight up shot.
This really looks best at the larger size 'L'.