There are plenty of campus life events at both institute locations, University of Hannover and University of Potsdam. On campus, you will find some interesting PhD programs which you can get involved, such as Graduiertenakademie/Graduate Academy (Hannover), Potsdam Graduate School, and Potsdam Research Network. Off campus, you will find there are lots to discover about Hannover or Portsdam and have a lot of fun.
On campus PhD Programmes:
The Graduate Academy of Leibniz Universität Hannover
Potsdam Graduate School (PoGS)
Off campus life: Sports, culture, and leisure activities, etc.
City of Hannover
City of Potsdam