Bernardino II da Polenta was lord of Ravenna, Italy from 1389 to 1400.[1] He was the son of Guido III da Polenta, grandson of Bernardino I and a member of the da Polenta family. Bernardino's mother was Elisa d'Este, the daughter of Obizzo III d'Este of Ferrara, who gave him numerous children.[2] In 1389, Bernardino and his brothers, Ostasio, Obizzo, Aldobrandino, Azzo and Pietro imprisoned their father and ruled Ravenna. The brothers died in quick succession; allegedly Bernardino was poisoned by his brother Obizzo.