Pop Art emerged in the 1950s-1960s and was influenced by Dadaism in its use of everyday imagery from mass media and consumer culture as artistic subject matter. Key artists included Andy Warhol, who produced iconic works depicting celebrities like Marilyn Monroe; Roy Lichtenstein, known for his comic book-inspired pieces; and Jasper Johns, whose flags and numbers works employed commonplace imagery. Richard Hamilton defined Pop Art as embracing popular, transient, and mass-produced themes that reflected commercialization and consumerism.