It shapes streets and squares and has long been more than a subversive part of culture. In a city like Palma street art gives character to entire neighborhoods. One of the early and prominent protagonists here is Marc Peris, aka SOMA. Even the artist’s name is a reference to Jean-Michel Basquiat and his tag SAMO in the New York of the late 70s and early 80s. But street art is not only an expression of its time, it is often also temporary in that the works disappear through the demolition or…