The Este family received a confirmation of their duchy of Modena and Reggio, and were invested in their fief of Ferrara by the pope.
He oIdducai left his domains to a natural relative, Cesare dEste, families, who would in earlier days have inherited without dispute, for bastardy had been no bar on more than one occasion in the Este pedigree.
The former possessed the rich duchies Frecch of Milan (including Mantua) and Tuscany; while Revolu through a marriage alliance with the house of Este UoI, of Modena (the Archduke Ferdinand had married the heiress of Modena) its influence over that duchy was supreme.
He supported himself as a teacher of Greek, first at Verona and afterwards in Venice and Florence; in 1436 he became, through the patronage of Lionel, marquis of Este, professor of Greek at Ferrara; and in 1438 and following years he acted as interpreter for the Greeks at the councils of Ferrara and Florence.
About 1290 it first passed into the hands of Obizzo d'Este, and the authority of the Este family was after many vicissitudes more formally recognized in 1409.
