Duchy of Florence

Duchy of Florence
Ducato di Firenze (Italian)
1532–1569
The Duchy of Florence (green) in 1548
CapitalFlorence
43°47′N 11°15′E / 43.783°N 11.250°E / 43.783; 11.250
Common languagesItalian
Religion
Catholic Church
GovernmentHereditary monarchy
Duke of Florence 
• 1532–1537
Alessandro
• 1537–1569
Cosimo I
History 
• Established
1532
1554
• Elevated to Grand Duchy
1569
CurrencyFlorin
Preceded by
Succeeded by
Republic of Florence
Republic of Siena
Grand Duchy of Tuscany
Today part ofItaly

The Duchy of Florence (Italian: Ducato di Firenze) was an Italian principality that was centred on the city of Florence, in Tuscany, Italy. The duchy was founded after Pope Clement VII, himself a Medici, appointed his relative Alessandro de' Medici as Duke of the Florentine Republic, thereby transforming the Republic of Florence into a hereditary monarchy.

The second Duke, Cosimo I, established a strong Florentine navy and expanded his territory, purchasing Elba and conquering Siena. In 1569, Pope Pius V declared Cosimo Grand Duke of Tuscany. The Medici ruled the Grand Duchy of Tuscany until 1737.