Candaules, King of Lydia, Shews his Wife by Stealth to Gyges, One of his Ministers, as She Goes to Bed, also known as The Imprudence of Candaules, is a 45.1 by 55.9 cm (17.8 by 22.0 in) oil painting on canvas by English artist William Etty, first exhibited in 1830. It shows a scene from the Histories by Herodotus, in which Candaules, king of Lydia, invites his bodyguard Gyges to hide in the couple's bedroom and watch his wife Nyssia undress, to prove to him her beauty. Nyssia notices Gyges spying, and challenges him to either kill himself or Candaules as a punishment; Gyges chooses to kill Candaules and to take his place as king. The painting shows the moment at which Nyssia, at this point unaware that she is being watched by anyone other than her husband, removes the last of her clothes.