Lucrezia de' Medici was a member of the House of Medici and by marriage Duchess consort of Ferrara, Modena and Reggio from 1558 to 1561.
Cosimo I de' Medici
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Cosimo I de' Medici was the second duke of Florence from 1537 until 1569, when he became the first grand duke of Tuscany, a title he held until his death.
Cosimo I de' Medici at about 19 years of age (by Pontormo, c. 1538)
Cosimo I's coronation as Grand Duke of Tuscany, which happened in 1570, Rome.
Official portrait of Cosimo I de' Medici as Grand Duke of Tuscany by Giovanni Battista Naldini