If you haven't seen it yet we really recommend everyone to have a look at it. A must see for everybody in Berlin! 
Over 100 Artist created a temporary gallery inside a old Bank building that will be destroyed at the end of may. So hurry up and visit The Haus in Nürnberger Straße 68. 
You can also book tour here:
http://www.thehaus.de/home--thehaus.html#home