Watch Artists of the 20th Century: Andy Warhol (2004) : Full Movie Online Free Considered by many to be the most influential American artist in the second half of the 20th century, Andy Warhol used commercial silk-screening techniques to create identical mass-produced images on canvas, and then added variations in color to give each print of an edition a different look. His quirky series of films (many shot at his Manhattan studio loft called "The Factory") were also influential.