Graffiti: 40 Years of Hacking New York City

"The title of The Museum of New York City’s latest street art retrospective  —  City as Canvas  —  seems little more than a clever name at first glance; a literal description of an art form that takes the very fabric of urban spaces — the brick and concrete of walls, the steel and plastic of subway cars — as its medium of choice. But in fact, the title is loaded with political and aesthetic connotations, and is in itself a bold statement about the legitimacy of an art form that has had a long, fraught, and troubled relationship with the city that spawned it."
Medium
City As Canvas
Martin Wong Graffiti Collection