Stream Hans Haacke: 4 Decades Online Free – Watch Full Movie from Home at 123Movies. . Hans Haacke is a key figure in contemporary art whose work intersects with conceptual, pop, minimal and land art. The artist is particularly known for his research into the hidden economies and politics of the art world and the repressed histories of places and peoples. Haacke's strong political, cultural and social concerns are reflected in his installations, texts and sculptures.