Berlin street art

Berlin has lots of street art, especially in the former East Berlin. Some is quite interesting, but there is way too much tagging for my taste. That stuff looks more defacing than the street art which does enhance the community.
The 1st picture is of paste up art. I'm told that some of these artists attend raves and other parties to take pictures anonymously. They select the ones they like to blow up and use for their art. Who knows? You might be famous on some wall in Berlin!
The 2nd is an example of a sculpture on the street with some tagging. The third is an example of the use of stencils and shows the temporary nature of much street art. Unless it is a recognized piece, it can be painted over.
The 4th picture is a recent work while the 5th is a work in progress.
The last picture, the astronaut, I'm told was done for a festival using a stenciling process. You can probably tell by the angle of the picture that it is high on the wall.もっと詳しく