Damocles, a flatterer at the court of the elder Dionysius, tyrant of Syracuse, whom, after one day extravagantly extolling the happiness of kings, Dionysius set down to a magnificent banquet, but who, when seated at it, looked up and saw a sword hanging over his head suspended by a single hair; a lesson this which admonished him, and led him to change his views of the happiness of kings.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Damietta * Damon and Pythias