Chris Fraser - Of All that is Seen and Unseen (2010)
Thomas Struth, Art Institute Of Chicago II, Chicago, 1990
This installation of thousands of yellow construction helmets posted in front of Milan’s stock exchange represents a Labor Day protest of unemployed Italian workers. Learn more here.
Bonus: the sculpture in the middle of the plaza is by Maurizio Cattelan and has its own interesting history.
Art as protest.