France, although Henry gave her no political influence.
He also gave the Château of Chenonceau, which Catherine
had wanted for herself, to his mistress Diane de Poitiers.
Chenonceau was the center of power.
Painting of Château de Chenonceau
Source picture: Wikipedia
When Henry II of France died in 1559, Catherine didn't hesitate to exploit her new
authority. She forced Diane de Poitiers to hand over the crown jewels and to return
the Château de Chenonceau to the crown.