The National Museum of Modern Art occupies three floors of the Center Pompidou. The top floor has the restaurant, Georges. There are also cafes on levels one and two. The ground floor is a hub of activity, with a post office, cloak rooms, ATMs, public telephones, restrooms....
Completed in 1978, the building was built ‘inside-out.’ All the plumbing, HVAC, water mains, elevators, and escalators were built outside and color-coded, making it look like a futuristic building from a science fiction movie.
Unverified tip: There is an elevator to the left of the main entrance to access the restaurant Georges. Might help skipping the lines to the museum, but you've gotta look super-cool and debonaire -- else the security guard will want to verify your reservation. ;)