Ostasio III da Polenta (died 1447) was the last lord of

Ravenna Ravenna ( , , also ; rgn, Ravèna) is the capital city of the Province of Ravenna, in the Emilia-Romagna region of Northern Italy. It was the capital city of the Western Roman Empire from 408 until its collapse in 476. It then served as the ca ...

of the

da Polenta The da Polenta () or Polentani () were an old noble Italian family whose name derives from the Castle of Polenta near Bertinoro in Romagna. The founder of the house is said to have been Guido, surnamed "l'Antico" (the Elder), who wielded great a ...

family. The son of

Obizzo da Polenta Obizzo da Polenta (died 30 January 1431) was an Italian nobleman and politician and the lord of Ravenna of the da Polenta family. Biography Obizzo da Polenta was the son of Guido III da Polenta, the Lord of Ravenna from 1359 to 1389. In 1389, Obi ...

, he inherited Ravenna but under the control of a ''

provveditore The Italian title ''prov ditore'' (plural ''provveditori''; also known in gr, προνοητής, προβλεπτής; sh, providur), "he who sees to things" (overseer), was the style of various (but not all) local district governors in the exten ...

'' from the nearby

Republic of Venice The Republic of Venice ( vec, Repùblega de Venèsia) or Venetian Republic ( vec, Repùblega Vèneta, links=no), traditionally known as La Serenissima ( en, Most Serene Republic of Venice, italics=yes; vec, Serenìsima Repùblega de Venèsia, ...

. In 1438 the condottiero

Niccolò Piccinino Niccolò Piccinino (1386 – 15 October 1444) was an Italian condottiero. Biography He was born in Perugia, the son of a butcher. Piccinino was introduced in the guild of Perugia's butchers. He was later scornfully called "son of a butcher" by ...

, commander of the

Milanese Milanese (endonym in traditional orthography , ') is the central variety of the Western dialect of the Lombard language spoken in Milan, the rest of its metropolitan city, and the northernmost part of the province of Pavia. Milanese, due to ...

troops, invaded the lordship, forcing Ostasio to ally himself with the

Visconti of Milan The Visconti of Milan are a noble Italian family. They rose to power in Milan during the Middle Ages where they ruled from 1277 to 1447, initially as Lords then as Dukes, and several collateral branches still exist. The effective founder of the ...

against Venice. The latter sent a fleet which conquered Ravenna without opposition, putting an end to the Polentani seigniory in February 1441. Ostasio was exiled to a Benedictine convent in Candia, in

Crete Crete ( el, Κρήτη, translit=, Modern: , Ancient: ) is the largest and most populous of the Greek islands, the 88th largest island in the world and the fifth largest island in the Mediterranean Sea, after Sicily, Sardinia, Cyprus, ...

, where he died in 1447, probably assassinated.

See also