Anger or the city hall?

In Naumburg (Saale), the city offers several destinations: Anger, the Rathaus, etc.

It appears that one can pick a state of unhappy emotion or the city hall. Perhaps if one visited the city hall and didn't find a desired outcome that could result in anger.

Or, it could just be that in German, "Anger" means a square/green. I guess it depends on the mood of the viewer.