Nolfo da Montefeltro

Nolfo da Montefeltro (born Sighinolfo; c. 1290–1364), son of Federico I, was count of Montefeltro from 1323 to 1360. In 1323, as a Ghibelline leader in the Marche, he defeated a papal army and retook Urbino; his first act as lord was to have his father's enemies killed. In 1333 he became an adviser to John of Bohemia and a captain of the papal army.

He took the fortress of San Leo and occupied Lucca for Pisa in 1342. In 1348 he commanded Venice's army against Gorizia and was made imperial vicar of Urbino; in 1351 Giovanni Visconti of Milan hired him and he took Cagli the next year.

Then the papal commander Albornoz pushed him back in 1354. Nolfo made peace and ruled as papal vicar until his death.