Ostasio III da Polenta
The son of Obizzo da Polenta, he inherited Ravenna but under the control of a proveditore from the nearby Republic of Venice. In 1438 the condottiero Niccolò Piccinino, commander of the Milanese troops, invaded the lordship, forcing Ostasio to ally himself with the Visconti of Milan against Venice. The latter sent a fleet which conquered Ravenna without opposition, putting an end to the Polentani seigniory in February 1441.
Obizzo da Polenta
|Lord of Ravenna
to the Republic of Venice
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