Curbed points out that it is Lord Norman Foster a.k.a. Baron Foster of Thames Bank, no longer simply Sir Norman Foster. (The architect was knighted in 1990 and appointed to the House of Lords in 1999.)

I did know the Lord part, but did not realize that he literally rules over the bank of the Thames. That's hot. I wish we had a queen to give out cool titles.

Not sure if this has anything to do with being boss of the river side, but I also recently learned that it costs developers extra to say "designed by Norman Foster" rather than Foster and Partners, his multinational practice. For reals. If a developer is going to cash in from using your name and face, you should probably get a cut. It's good to be the Baron.