Since her earliest works, Sherman has played with masculinity and gender expression. In Bus Riders and Murder Mystery, two series from 1976, she impersonates both men and women of different age, color and social status, using elaborate disguises to hide her individuality behind stereotypical character representations. In the diptych Doctor and Nurse (1980–87), Sherman stages herself in a clichéd depiction of a 1950s male doctor and female nurse; and her mise-en-scène as clergymen and aristocrats in History Portraits (1988–90) comments critically on the male-dominated nature of European art history. Finally, the notion of gender is eliminated entirely in her more recent Clown series (2004) by means of thick layers of face paint and shapeless costumes.