Blu’s destruction of his work in May 2016, as an extreme response to the exibition Street Art - Banksy & Co.: Art in the Urban Form, placed Bologna at the center of international attention, and again forced the academic world to reflect on street art. A year ago, we asked experts in the fields of semiotics, philosophy, sociology and art history to use this single case to reflect on the themes of musealization, transmission and preservation of street art. The authors have investigated the many contradictions of this phenomenon--illegality and institutional recognition, anonymity and authorship, ephemerality and conservation--, and in so doing they tried to respond to our questions: Who does street art belong to? How is it expected to evolve? Can street art and graffiti writing be preserved? And how? What is the relationship between street art and new media?