Access to the rooms on the 3rd floor is possible from the nearest staircase. Communication between the rooms is possible by passages on the 2nd floor (and terrace on the 3rd floor in summer). The lift (in the back right corner of the entrance hall) only reaches the 2nd floor.

Rooms 328-334 can be reached from room 327.

The Division of Research Documentation is situated on the 1st floor in the northern wing (room 146).