A map guiding you to the Faculty of Physics you can find here
The institute is partly accommodated by the Max Planck Institute for Dyanmics and Self-Organization (MPI DS), Am Faßberg 17, 37077 Göttingen.
A description how to get there you'll find through this link.
If you have any general questions please contact the secretary (contact address in the left column).
If you want to contact a specific person affiliated with the institute, please look up the contact data on the people page.