Ubaldo I Visconti (died 1230) was the ''

de jure In law and government, ''de jure'' ( ; , "by law") describes practices that are legally recognized, regardless of whether the practice exists in reality. In contrast, ("in fact") describes situations that exist in reality, even if not legally ...

'' overlord of the

Giudicato of Cagliari The Judicate of Cagliari ( sc, Judicadu de Càralis / Càlaris, it, Giudicato di Cagliari) was one of the four Sardinian ''judicates'' of the Middle Ages, kingdoms of Byzantine origins. The Judicate of Cagliari covered the entire south and centra ...

from 1217. He was a member of the Visconti family of Pisa, controlling Cagliari on behalf of his brother, who was judge '' jure uxoris'' from 1218. His grandfather,

Alberto Alberto is the Romance languages, Romance version of the Latinized form (''Albertus'') of Germanic languages, Germanic ''Albert (given name), Albert''. It is used in Italian language, Italian, Portuguese language, Portuguese and Spanish language, ...

, was a

patrician Patrician may refer to: * Patrician (ancient Rome), the original aristocratic families of ancient Rome, and a synonym for "aristocratic" in modern English usage * Patrician (post-Roman Europe), the governing elites of cities in parts of medieval ...

of Pisa, while his father, Eldizio, was patrician and

consul Consul (abbrev. ''cos.''; Latin plural ''consules'') was the title of one of the two chief magistrates of the Roman Republic, and subsequently also an important title under the Roman Empire. The title was used in other European city-states throu ...

. He and his brother Lamberto in turn served as patrician and ''

podestà Podestà (, English: Potestate, Podesta) was the name given to the holder of the highest civil office in the government of the cities of Central and Northern Italy during the Late Middle Ages. Sometimes, it meant the chief magistrate of a city ...

''. Ubaldo's grandmother was Aligarda and his mother was a daughter of Torchitorio III of Cagliari, through whom he would have inherited some claim on the ''giudicato''. Around 1200, Ubaldo was assisting

William I of Cagliari William I (c. 1160–1214), royal name Salusio IV, was the Giudicato of Cagliari, '' judike'' of Cagliari, meaning "King", from 1188 to his death. His descendants and those of his immediate competitors intermarried to form the backbone of the I ...

on behalf of Pisa in a war with Comita III of Logudoro when the two warring ''giudici'' came to terms. In 1212, there was complete anarchy in Pisa. A pro-Visconti faction was at war with an anti-Visconti one. In mid-January 1213, William of Cagliari led the forces of Massa, Pistoia, the anti-Visconti faction in Pisa, and the militia of Guido Guerra III to victory near Massa over the forces of

Lucca Lucca ( , ) is a city and ''comune'' in Tuscany, Central Italy, on the Serchio River, in a fertile plain near the Ligurian Sea. The city has a population of about 89,000, while its province has a population of 383,957. Lucca is known as one ...

supported by the Visconti under Ubaldo, and by the deposed Pisan ''podestà'' Goffredo Musto. Pisa was forced to accept four rectores, only one of which was a Visconti. In 1214, Lamberto and Ubaldo took the opportunity that year to launch an offensive at Cagliari and

Arborea Arborea is a town and ''comune'' in the province of Oristano, Sardinia, Italy, whose economy is largely based on agriculture and cattle breeding with production of vegetables, rice, fruit and milk (notably the local milk product Arborea). Histo ...

, but were beaten off by Comita and

Genoa Genoa ( ; it, Genova ; lij, Zêna ). is the capital of the Italian region of Liguria and the sixth-largest city in Italy. In 2015, 594,733 people lived within the city's administrative limits. As of the 2011 Italian census, the Province of ...

. The war continued at sea, but was arrested by the entreaties of

Pope Honorius III Pope Honorius III (c. 1150 – 18 March 1227), born Cencio Savelli, was head of the Catholic Church and ruler of the Papal States from 18 July 1216 to his death. A canon at the Basilica di Santa Maria Maggiore, he came to hold a number of impor ...

, who forced Comita to come to terms with Pisa (1 December 1217). In 1215, profiting from the weakness of the ''giudicessa''

Benedetta of Cagliari Benedetta (c. 1194 – 1232/33) was the daughter and heiress of William I of Cagliari and Adelasia, daughter of Moroello Malaspina. She succeeded her father in January or February 1214. She was consecrated in 1214 by Riccus, Archbishop of Ca ...

, Lamberto assembled a large fleet and landed an army at Cagliari. He captured the adjacent hill, S. Gilla, which dominated the city, and fortified it. To Ubaldo he gave the job of finishing the conquest and securing Pisan control of Cagliari. He forced Benedetta to flee her capital. In 1217, Ubaldo forced her to accept terms surrendering Cagliari. She received her ''giudicato'' back as fief from the consul of Pisa. However, violence between Sardinians and Pisans escalated in Cagliari and Benedetta and her husband, Torchitorio IV, made an alliance with Comita and Genoa in hopes of expelling the Pisans. Meanwhile, Lambert's wife,

Elena of Gallura Elena (c. 1190–1218) was the daughter and successor of Barisone II of Gallura and was named after her mother Odolina of the Lacon family. First queen regnant in Sardinia, she ruled Gallura from the death of her father until her own death, tho ...

, died sometime before 1220 and, in 1218, a year after the death of Benedetta's husband, Ubaldo arranged the marriage of Benedetta with Lamberto. The two were married, despite papal objections, on 9 April 1220. In 1230, Ubaldo, who had controlled Cagliari since 1215, died. His nephew, Lamberto's son, Ubaldo II, inherited his position. His son

John John is a common English name and surname: * John (given name) * John (surname) John may also refer to: New Testament Works * Gospel of John, a title often shortened to John * First Epistle of John, often shortened to 1 John * Secon ...

would be Ubaldo II's successor in the

Giudicato of Gallura The Judicate of Gallura ( lat, Iudicatus Gallurae, sc, Judicadu de Gallura, it, Giudicato di Gallura) was one of four Sardinian judicates in the Middle Ages. These were independent states whose rulers bore the title ''iudex'', judge. Gallura, a ...

Sources

*Ferrabino, Aldo (ed). ''Dizionario Biografico degli Italiani: I Aaron – Albertucci''.

Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg , map_caption ...

, 1960. {{DEFAULTSORT:Ubaldo 01 Visconti 1230 deaths Visconti of Pisa and Sardinia Year of birth unknown