The Persecution and Assassination of Jean-Paul Marat as Performed by the Inmates of the Asylum of Charenton Under the Direction of the Marquis de Sade (often shortened to Marat/Sade, for simplicity's sake) is a 1963 play by Peter Weiss which tells the story of, well...the title sort of covers that. A brilliant play-within-a-play, the principal characters of the Tragedy are played by inmates with various wacky little quirks, ranging from narcolepsy to paranoid schizophrenia. Hilarity Ensues. Oh, did we mention that this is also a musical?