Guidantonio da Montefeltro (1377 – February 1443) was count of Urbino in Italy from 1403 until his death.

In 1403, at the death of his father Antonio

Antonio II da Montefeltro

Antonio II da Montefeltro was an Italian condottiero and count of Urbino.Born at Urbino, he was a grandson to count Nolfo da Montefeltro and the son to Federico II da Montefeltro. He occupied Urbino in 1375 and also owned Cagli...

, Guidantonio inherited the family lands in the region of Italy called 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...

. Later he abandoned the Papal suzerainty and allied with King Ladislaus of Naples, who made him Grand connestabile of the Kingdom of Naples

Kingdom of Naples

The Kingdom of Naples, comprising the southern part of the Italian peninsula, was the remainder of the old Kingdom of Sicily after secession of the island of Sicily as a result of the Sicilian Vespers rebellion of 1282. Known to contemporaries as the Kingdom of Sicily, it is dubbed Kingdom of...

 in 1411. Excommunicated by Pope Gregory XII

Pope Gregory XII

Pope Gregory XII , born Angelo Correr or Corraro, Pope from 1406 to 1415, succeeded Pope Innocent VII on 30 November 1406....

, he took advantage of that move to conquer Assisi

Assisi

- Churches :* The Basilica of San Francesco d'Assisi is a World Heritage Site. The Franciscan monastery, il Sacro Convento, and the lower and upper church of St Francis were begun immediately after his canonization in 1228, and completed in 1253...

.

Guidantonio later reconciled with Pope Martin V

Pope Martin V

Pope Martin V , born Odo Colonna, was Pope from 1417 to 1431. His election effectively ended the Western Schism .-Biography:...

 and with his enemy, the condottiero Braccio da Montone

Braccio da Montone

frame|Braccio da Montone.Braccio da Montone , born Andrea Fortebracci, and also known as Braccio Fortebraccio, was an Italian condottiero.-Biography:...

. In 1427 he occupied Urbania

Urbania

For the 2000 film, see Urbania Urbania is a comune in the Province of Pesaro e Urbino in the Italian region of Marche, located about 80 km west of Ancona and about 40 km southwest of Pesaro, next to the river Metauro....

.

He died in 1443, his son Oddantonio

Oddantonio da Montefeltro

Oddantonio da Montefeltro was the first duke of Urbino in Italy.Oddantonio succeeded his father Guidantonio as count of Urbino. He was the half-brother of Federico da Montefeltro. The testamentary division of the county between Oddantonio and Federico is not known; nor is the relationship between...

 succeeding him in Urbino.

Family and children

He married Ringarda Malatesta

House of Malatesta

The House of Malatesta was an Italian family that ruled over Rimini from 1295 until 1500, as well as other lands and towns in Romagna.Malatesta da Verucchio The House of Malatesta was an Italian family that ruled over Rimini from 1295 until 1500, as well as (in different periods) other lands and...

 in 1397, but the two had no children. Guidantonio remarried with Caterina Colonna, who bore him 9 children. Apart from Oddantonio, his most famous son was Federico

Federico da Montefeltro

Federico da Montefeltro, also known as Federico III da Montefeltro , was one of the most successful condottieri of the Italian Renaissance, and lord of Urbino from 1444 until his death...

, who was Duke of Urbino, as well as a condottiero and one of the most famous patron of arts in the Italian Renaissance

Italian Renaissance

The Italian Renaissance began the opening phase of the Renaissance, a period of great cultural change and achievement in Europe that spanned the period from the end of the 13th century to about 1600, marking the transition between Medieval and Early Modern Europe...

. His daughter Sveva

Seraphina Sforza

Seraphina Sforza , born Sveva da Montefeltro, was an Italian noblewoman and nun, a Poor Clare after her husband Alessandro Sforza discarded her....

 (1434–1478) married Alessandro Sforza

Alessandro Sforza

Alessandro Sforza was an Italian condottiero and lord of Pesaro, the first of the Pesaro line of the Sforza family.-Biography:...

, lord of Pesaro

Pesaro

Pesaro is a town and comune in the Italian region of the Marche, capital of the Pesaro e Urbino province, on the Adriatic. According to the 2007 census, its population was 92,206....

.