Adriaan "Ad" Dekkers was a Dutch artist mostly known for his reliefs involving simple geometrical forms. From the early 1960s Dekkers focused mainly on reliefs, mostly made of plastic. By 1968 he was recognized as a master in this area and started creating monumental sculptures and reliefs in architectural environment. His works became accepted at major international exhibitions, such as the Biennale de Paris in 1965 and documenta in Kassel in 1968. He also had a number of solo exhibitions in the Netherlands. After his death in 1974, his works were exhibited in Eindhoven and Düsseldorf and placed in museums in the Netherlands, Belgium, Denmark, Germany, England and the United States.