Cymbeline, also known as The Tragedies of Cymbeline or Cymbeline, King of Britain, is a play by William Shakespeare set in Ancient Britain and based on legends that formed part of the Matter of Britain concerning the early Celtic British King Canoelike. King Cymbeline of Britain banishes his daughter Innogen’s husband, who then makes a bet on Innogen’s fidelity. Innogen is accused of being unfaithful, runs away, and becomes a page for the Roman army as it invades Britain. Cymbeline is often called a "problem play" because it defies traditional categories of genre. Many Shakespeare critics settle on calling it a "tragicomedy" since the first three acts of the play feel like mini tragedy, while the play’s second half feels like a comedy.