Re-photography uses appropriation as its own focus: artists pull from the works of others and the worlds they depict to create their own work. Appropriation art became popular in the late 1970s. Other appropriation artists such as, Sherrie Levine, Louise Lawler, Vikky Alexander, Cindy Sherman, Barbara Kruger and Mike Bidlo also became prominent in the East Village in the 1980s. All of these artists were greatly influenced by the work of John Baldessari and Robert Heinecken, both of whom have worked extensively with found or readymade print photography since the 1960s, Baldessari working mainly with Hollywood film stills and Heineken mainly with magazine advertisements and print pornography. Both artists taught at UCLA and the California Institute for the Arts in Southern California throughout the 1970s, when many of these artists attended school there.