Ostasio da Polenta
Ostasio da Polenta (died 1297) was an Italian condottiero, a son of Guido da Polenta il Vecchio, founder of da Polenta rule in Ravenna. In 1282 he fought alongside the papal commander Giovanni d'Appia and helped storm Ghibelline Meldola, held by Guido da Montefeltro. He was elected podestà of Faenza in 1288 and podestà of Ravenna in 1290.
In 1297 he was joint podestà of Ravenna with his brother Lamberto, and died that year. His son Guido Novello ruled Ravenna as Dante's host.