Andy Warhol (1928 - 1987) was an American artist who was a leading figure in the visual art movement known as pop art. His works explore the relationship between artistic expression, celebrity culture, and advertising that flourished by the 1960s. After a successful career as a commercial illustrator, Warhol became a renowned and sometimes controversial artist. His art used many types of media, including hand drawing, painting, printmaking, photography, silk screening, sculpture, film, and music. His studio, The Factory, was a well known gathering place that brought together distinguished intellectuals, drag queens, playwrights, Bohemian street people, Hollywood celebrities, and wealthy patrons. He is also notable as a gay man who lived openly as such before the gay liberation movement, and he is credited with coining the widely used expression "15 minutes of fame".