In the
Battle of Portomaggiore of 1395, mercenary troops of the Ferrara Regency Council, assisted by allies from Florence, Bologna, and Venice and fighting in the name of the young
Niccolò III d'Este, Marquis of Ferrara beat the rebel forces of his uncle,
Azzo X d'Este, pretender to the Lordship of Ferrara.
Azzo X d'Este was captured in the battle. ==Main sights==