Diana de Poitiers, the mistress of Henry II. of France, for whom he built the magnificent Château d'Anet, in Eure-et-Loir; she had a great influence over him, and the cruel persecutions of the Huguenots in his reign were due to her instigation (1490‒1566).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Diana * Diana of France