There's a place in Berlin that can't be defined. In the 39 Rosenthaler Strasse, there's a discreet and disguised gate; a hole in the front of some old jew houses in Hackescher Markt. Beyond the gate, we find a magic courtyard, with thousands of Graffities, and many strange doors that guide us towards strange and secret spots.
In this gloomy courtyard there is an arts cinema, a couple of alternatives cafes, galleries, some strange shop. This place has an atmosphere of anarchy, as we were in the pre-war slums.
There also is a museum about Anna Frank.
Some people say that this place is an oasis in the middle of the gentrified heart of Berlin. Others have said that for getting a proper feeling of the soul of the current Berlin you have to go to Haus Schwarzenberg. I'd say that this uncommon point in a tech town expresses what Berlin is and what it hides inside its meaning.