Yea, I'm fairly certain it's a hallway. I agree the concrete is done in such a way that it's not meant to be seen as a fugly bare unadorned wall, and with that I find that the entire concrete shell has an interesting look, especially now since it's so rare to find a wall like the one in the City Hall. The age on the concrete really shows, adding some texture and a certain look to it.
(Taken by me nearly a year ago)
[IMG]
Mossius by
Josh Kenn Photographics, on Flickr[/IMG]