The king of hearts is a face card in decks of French-suited playing cards, depicting a king of the hearts suit and associated with the King of Franks Charlemagne. The card is also sometimes called the "Suicide King" due to an optical illusion where it appears the king is stabbing himself with a sword, leading to interpretations of sacrifice or the end of old orders. The king of hearts is also the only king without a mustache. This was due to the fact it was lost during the reproduction of the original design due to the wear and tear on the original wooden printing blocks used for mass production.