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It all started when the Academy of Fine Arts in Berlin started to prepare the exhibition "Spray City" in the included in "X94 - young art and culture." Within the research for this event the authors discovered the unbelievable variety of this phenomenon called Grafitti. A fantastic world of pictures, complex, multi-layered philosophies and massive prejudices in all classes of the people were only some of the problems and contrasts that were met. This led to the idea to continue researches in the field this uncommon, transitory and still so vast new expression of art. The result is a kind of an ongoing encyclopedia of Grafitti containing 14 volumes so far.