Alfred Julio Jensen (11 December 1903 â 4 April 1981) was an abstract painter. His paintings are often characterized by grids of brightly colored triangles, circles or squares, painted in thick impasto. Conveying a complex web of ideas, often incorporating calligraphy or numerical systems, they are frequently referred to as "concrete" abstract art. After his death in 1981, the Guggenheim organized a major retrospective of his work, having held his solo exhibition there in 1961.
