Going by car:

On the freeway A4/E40 take exit number 11 Klettenberg and follow signs to Cologne. When reaching the junction with Universitätsstraße (1) (you see a highrise on your left) follow the signs to the university: cross the junction, make a u-turn and turn right into Universitätsstraße. After approximately 300 meters you will see a sign leading to the parking lot (2) of the physical and chemical institutes. There you will face two large white buildings, the left of which is the department of physics (4).

From Köln Bonn Airport:

Take train S13 to Köln (Ticket Zone 1b) and get off at station Köln-Deutz. At the rear of the platform take the connection tunnel to streetcar line 9, direction Sülz. The department of physics (4) is located next to station Universität (3) Total time of travel about 30 minutes.

From Cologne Main Station:

Follow the "U" signs to one of the two underground stations next to the main station. Take streetcar line 18, direction Klettenberg or Brühl or Bonn (Ticket Zone 1b). After about 10 minutes travel time, exit at station Eifelwall and cross an wide meadow half right in the direction of travel to reach the department of physics (4).

From Köln-Süd railway station:

Take the northern exit (5) (Zülpicher Straße) and turn left. After about 500 m you reach the institute for theoretical physics (4) on your left.