Unterwegs im Licht

In the organizer's words:

• When the center of Potsdam shines in bright light and young and old
  are on the move in the heart of the city ...
• When cultural players open their houses and entice visitors with colorful programs ...
• When exhibitions fascinate and the Potsdamer Mitte can be viewed from above
  from above ...
• When children's eyes and homemade lanterns light up ...
  ... then you are part of Unterwegs im Licht.

You can find the program here.