Obizzo da Polenta

In 1389, Obizzo overthrew and imprisoned his father with the help of his brothers Bernardino, Ostasio, Aldobrandino, Azzo, and Pietro.

After his father's death from starvation later that year, his brother Aldobrandino assumed power over the city.

When his last brother, and Lord of Ravenna, Aldobrandino, died in 1406, Obizzo gained undisputed power over the city.

In 1406, he asked Venice to send a podestà in Ravenna as protection for him and his sons.

Obizzo was married in 1414 to Elisabetta Malatest,daughter of Andrea Malatesta di Cesena