For much of Artur Barrio's career, Brazil was in the hands of a military dictatorship after the coup d'état in 1964.
In 1970 he created Situação .. DEFL .. +s+ .. ruas .. Abril .. (Unleashing confusion on the streets .. Situation) consisting of "the placement of five hundred plastic bags containing blood, nails, dung, waste, and other debris in downtown Rio during the peak of the dictatorship's repression" [REF] .