Minimalism emerged as an art movement in the 1960s that aimed to dismantle illusionism and focus on the inherent properties of materials. Artists like Donald Judd, Carl Andre, and Dan Flavin created simple sculptures and structures using industrial materials. Around the same time, Conceptual art developed with works centered around ideas rather than aesthetic forms, inspired by Duchamp's readymades. Site-specific artworks of the period engaged with natural environments on a large scale, with works by Robert Smithson and Michael Asher sited outdoors.