Duke of Ferrara and of Modena
…descendants, and the marquisate was delegated to a cadet branch of the Este family. Later, they were also created marquesses of Modena and Reggio. In 1452 Borso d'Este, then marquis of Modena and Reggio, was raised by Emperor Frederick III with the title of duke of Modena and Reggio. In 1471, Pope Paul II formally…