Lee Ufan is a South Korean artist and philosopher known for his minimalist sculptures and paintings that explore the relationship between materiality, space, and spirituality. He was a key figure in the Mono-ha movement in Japan during the 1960s and 1970s. Ufan's art is marked by its use of natural materials, such as stone and steel, and its emphasis on the relationship between the artwork, the viewer, and the surrounding environment.