Piero Simondo is a founder of the Situationist International. He turns 80 today.

1957: Piero Simondo and Guy Debord photographed by Ralph Rumney at Cosio d’Arroscia, Italy. [1]

The founders of the Situationist International at Cosio d’Arroscia, in April 1957[3]. From left to right; Giuseppe Pinot-Gallizio, Piero Simondo, Elena Verrone, Michele Bernstein, Guy Debord, Asger Jorn and Walter Olmo.

Sholem Stein has recently noted that Situationist practices continue to influence underground street artists such as gHOSTbOY, Banksy, Borf, and Mudwig, whose artistic interventions and subversive practice can be seen on advertising hoardings, street signs and walls throughout Europe and The United States. The aforementioned use stencil graffiti.