Diane de Poitiers (3 September 1499 – 25 April 1566) was a French noblewoman and a prominent courtier. She became notorious as the Henry II of France's favourite. Diane de Poitiers would remain Henry's lifelong companion. Henry entrusted Diane with the Crown Jewels of France, had the Château d'Anet built for her, and gave her the Château de Chenonceau. Many of Henry's official letters were signed HenriDiane.
A design of three interlaced crescent moons, similar to the Borromean rings, can be seen at the Palace of Fontainebleau. Sometimes the points of each moon meet, completing the rings. The motif was designed by the architect Philibert de l'Orme, and is based on the moon emblem used by Diane de Poitiers (1499-1566), mistress of King Henry II of France. There may be also an Italian influence since the Queen of France was Caterina II de Medici.
1550 Diane de Poitiers after François Clouet. Her headdress in this and the next image is unusual and not really a French hood. The object she holds could be a lens. Catherine was a widow when she became involved with Henri II, demonstrated by the black and white dress and hood worn in this portrait.