Cosimo I de' Medici

Cosimo I
Portrait of Cosimo I de' Medici, c. 1545
Duke of Florence
Reign	6 January 1537 – 21 August 1569
Predecessor	Alessandro
Grand Duke of Tuscany
Reign	21 August 1569 – 21 April 1574
Successor	Francesco I
Born	12 June 1519 Florence, Republic of Florence
Died	21 April 1574(1574-04-21) (aged 54) Florence, Grand Duchy of Tuscany
Spouse	Eleanor of Toledo ​ ​ (m. 1539; died 1562)​ Camilla Martelli ​ ​ (m. 1570)​
Issue more...	Bia de' Medici Maria de' Medici Francesco I de' Medici Isabella, Duchess of Bracciano Cardinal Giovanni Lucrezia, Duchess of Modena Garzia Ferdinando I de' Medici Pietro Virginia, Duchess of Modena
Names Cosimo I de' Medici
House	Medici
Father	Giovanni delle Bande Nere
Mother	Maria Salviati
Religion	Catholicism
Signature

Cosimo I de' Medici (12 June 1519 – 21 April 1574) 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.