“You had names like Click ... quot;The History of American Graffiti" co-author Caleb Neelon at Peters Park in Boston (Andrea Shea/WBUR) As we walk Neelon stops and points to a remnant ...

Graffiti entrepreneurs Roger Gastman, co-curator of MOCA’s show, and Caleb Neelon have compiled more of an informal encyclopedia than a formal history, but it’s packed with information.

And before Marc Ecko and Shepard Fairey were household names designing clothes or Obama campaign posters, they were (and still are sometime) street artists. But graffiti is, by definition ...