Ambrosian Republic
1450 CE – 1452 CE · Capital: Milan · 29,911 km²

The Golden Ambrosian Republic (Lombard: Aurea Republega Ambrosiana; Italian: Aurea Repubblica Ambrosiana; 1447–1450) was a short-lived republic founded in Milan by members of the University of Pavia with popular support, during the first phase of the Milanese War of Succession. They held out against France (battle of Bosco Marengo), the Republic of Venice (battle of Caravaggio), and the Swiss (battle of Castione); the Republic was abolished by the condottiero Francesco Sforza, who made himself Duke of Milan.
From Wikipedia: Golden Ambrosian Republic (CC BY-SA 4.0)
Origins and Founding
When Filippo Maria Visconti, Duke of Milan, died on 13 August 1447, the city was thrown into confusion by his unexpected demise and the speed with which claimants to his title acted. Filippo Maria had no heir through male bloodlines and therefore a succession crisis occurred.
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Francesco Sforza, a famous condottiero and Filippo Maria's son-in-law through his illegitimate daughter Bianca Maria Visconti.
The two most prominent candidates supported by the Milanese population were however Alfonso of Aragon and Francesco Sforza.
The Bracceschi family, supporters of the King of Aragon, seized the city on the 13th, the night of Duke Filippo Maria's death, forcing the captains to swear allegiance to Alfonso. However, other influential citizens believed that a republic could be proclaimed.
From Wikipedia: Golden Ambrosian Republic · History: Foundation (CC BY-SA 4.0)
- Founded
- 1450 CE
- Preceded by
- Duchy of Milan
Rulers
- Mains of the 12 members: Carlo Gonzaga of Milan
- Vitaliano I Borromeo
Government, Society and Religion
- Government
- Directorial republic
- Languages
- Lombard
- Religion
- Roman Catholicism
Coins, Currency and Symbols
- Currency
- Soldo

Vessillo della Repubblica Ambrosiana (1447-1450) Unknown author · Public domain · Commons
Decline and Fall
Sforza was coming close to Milan itself in his conquests, and decided that since it was too powerful to be taken by force, he would surround it and starve the populace into surrender. With the loss of the outer cities by conquest or defection, Milan experienced famine. Gonzaga offered Crema to Sforza, hoping he would be tempted to take it himself and betray the Venetians. But Sforza remained staunch, and instead offered Gonzaga the city of Tortona if he would abandon Crema. This was accepted, and Crema, without support, quickly capitulated.
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To the Milanese, Sforza's victory now seemed certain, but he found his Venetian allies beginning to have doubts about their Captain-General. They decided that Milan run by Sforza would be far more dangerous and detrimental to their interests than if it were run by a weak Republic.
From Wikipedia: Golden Ambrosian Republic · History: End of the Republic (CC BY-SA 4.0)
- Ended
- 1452 CE
- Succeeded by
- Duchy of Milan




































