The drawing below is from Gustave Eiffel's book describing the tower that bears his name. There are 53 of them in total.
XVIII. Ground floor and first floor
Plate XVIII is probably the most interesting of all. It contains the interior arrangements of the pillars and the first floor, it is on this board that we see where the theater was, the two restaurants (one French, the other Russian, locker rooms, local guardian of night, etc.). It is a little technical board, despite the fact that there are still ribs, of course.