Nolfo da Montefeltro was count of Montefeltro from 1323 to 1360. He was the son of Federico I da Montefeltro, who had been slain by the people of the city in revolt against him.

In 1323 Nolfo, now a leader of the Ghibelline part in the Marche

Marche

The population density in the region is below the national average. In 2008, it was 161.5 inhabitants per km2, compared to the national figure of 198.8. It is highest in the province of Ancona , and lowest in the province of Macerata...

, reconquered the city by defeating the Papal commander, Ferrantino Malatesta

Ferrantino Malatesta

Ferrantino Malatesta was a lord of Rimini and several other lands in northern Italy, a member of the Malatesta family....

. His first move as lord was the assassination of all his father's enemies.

In 1333 he was named advisor by John of Bohemia and captain of the Papal Army. Nolfo annexed Borgo San Sepolcro and the fortress of San Leo

San Leo

San Leo is a comune in the Province of Rimini in the Italian region Emilia-Romagna, located about 135 km southeast of Bologna and about 35 km southwest of Rimini.-Geography:...

, and was hired as condottiero by the Pisane

Republic of Pisa

The Republic of Pisa was a de facto independent state centered on the Tuscan city of Pisa during the late tenth and eleventh centuries. It rose to become an economic powerhouse, a commercial center whose merchants dominated Mediterranean and Italian trade for a century before being surpassed and...

, for which he occupied Lucca

Lucca

Lucca is a city and comune in Tuscany, central Italy, situated on the river Serchio in a fertile plainnear the Tyrrhenian Sea. It is the capital city of the Province of Lucca...

 in 1342. In 1348 he was appointed commander-in-chief of the Republic of Venice

Republic of Venice

The Republic of Venice or Venetian Republic was a state originating from the city of Venice in Northeastern Italy. It existed for over a millennium, from the late 7th century until 1797. It was formally known as the Most Serene Republic of Venice and is often referred to as La Serenissima, in...

's army against the counts of Gorizia; he was also made imperial vicar of the county of Urbino. In 1351 he was hired by Giovanni Visconti, lord of Milan

Milan

Milan is the second-largest city in Italy and the capital city of the region of Lombardy and of the province of Milan. The city proper has a population of about 1.3 million, while its urban area, roughly coinciding with its administrative province and the bordering Province of Monza and Brianza ,...

. The following year he captured Cagli

Cagli

Cagli is a town and comune in the province of Pesaro e Urbino, Marche, central Italy. It c. 30 km south of Urbino.-History:Cagli occupies the site of an ancient village on the Via Flaminia, which seems to have borne the name Cale, 24 miles north of Helvillum and 18 miles southwest of Forum...

, but was pushed back in 1354 by the Papal commander Gil de Albornoz, sent in Italy to reconquer the fractionated Papal States.

After signing a treaty of peace, he was made Papal vicar in his lands. Nolfo died in 1362.