Christina of Lorraine
Christina of Lorraine (French: Christine de Lorraine, Italian: Cristina di Lorena) (16 August 1565 – 19 December 1637) was a noblewoman of the House of Lorraine who became a Grand Duchess of Tuscany by marriage. She served as Regent of Tuscany jointly with her daughter-in-law during the minority of her grandson from 1621 to 1628.