Setting a time and a place for the birth of street or urban art is always a tricky question, as one could argue that its history is as old as humanity. Besides, it’s not that easy to find documentation about the development of street art and graffiti before the 1980s because of the way technology has transformed the way we study the past. Any episode before the advent of the internet or digital cameras isn’t as easy to track down, particularly in regards to underground scenes. Sure there’s the library but only academics, writers, and intellectuals tend to venture into the hallowed halls of learning to spend a whole day (or days) researching. Here are some precedents you may not know about.