Pollock is widely considered the most challenging and influential artist of the twentieth century. In his revolutionary paintings of the late 1940s he dripped or poured paint into complex webs of interlacing lines, rhythmically punctuated by pools of color. With their allover composition, seemingly total abstraction, and gestural but remarkably controlled handling of paint, these powerful works announced the emergence of Abstract Expressionism. (Vernadoe for MOMA)