Adalbert I (c. 820 – 886{{cite book , first=Chris , last=Wickham , year=1990 , title=Early Medieval Italy: Central Power and Local Society 400-1000 , publisher=University of Michigan Press , isbn=978-0-472-08099-1 , page=59 ) was the

margrave of Tuscany The rulers of Tuscany varied over time, sometimes being margraves, the rulers of handfuls of border counties and sometimes the heads of the most important family of the region. Margraves of Tuscany, 812–1197 House of Boniface :These were origin ...

from about 847 and the guardian of the island of

Corsica Corsica ( , Upper , Southern ; it, Corsica; ; french: Corse ; lij, Còrsega; sc, Còssiga) is an island in the Mediterranean Sea and one of the 18 regions of France. It is the fourth-largest island in the Mediterranean and lies southeast of ...

(''tutor Corsicae insulae''). He was the son of Boniface II, Margrave of Tuscany, who had been despoiled of his fiefs by the Emperor

Lothair I Lothair I or Lothar I (Dutch and Medieval Latin: ''Lotharius''; German: ''Lothar''; French: ''Lothaire''; Italian: ''Lotario'') (795 – 29 September 855) was emperor (817–855, co-ruling with his father until 840), and the governor of Bavar ...

, and successor of his elder brother Aganus. The reign of Adalbert was long and successful. He took the side of Carloman,

King of Bavaria King of Bavaria was a title held by the hereditary Wittelsbach rulers of Bavaria in the state known as the Kingdom of Bavaria from 1805 until 1918, when the kingdom was abolished. It was the second time Bavaria was a kingdom, almost a thousand ...

, against

Charles the Bald Charles the Bald (french: Charles le Chauve; 13 June 823 – 6 October 877), also known as Charles II, was a 9th-century king of West Francia (843–877), king of Italy (875–877) and emperor of the Carolingian Empire (875–877). After a ser ...

King of France France was ruled by monarchs from the establishment of the Kingdom of West Francia in 843 until the end of the Second French Empire in 1870, with several interruptions. Classical French historiography usually regards Clovis I () as the first ...

, in the struggle for the

Kingdom of Italy The Kingdom of Italy ( it, Regno d'Italia) was a state that existed from 1861, when Victor Emmanuel II of Kingdom of Sardinia, Sardinia was proclamation of the Kingdom of Italy, proclaimed King of Italy, until 1946, when civil discontent led to ...

, despite the latter being supported by the

pope The pope ( la, papa, from el, πάππας, translit=pappas, 'father'), also known as supreme pontiff ( or ), Roman pontiff () or sovereign pontiff, is the bishop of Rome (or historically the patriarch of Rome), head of the worldwide Cathol ...

. When the Roman court persisted in this "interference", Adalbert marched on the eternal city, forced John VIII to take refuge in the

St Peter's Basilica The Papal Basilica of Saint Peter in the Vatican ( it, Basilica Papale di San Pietro in Vaticano), or simply Saint Peter's Basilica ( la, Basilica Sancti Petri), is a church built in the Renaissance style located in Vatican City, the papal en ...

, and forced the Roman citizens to swear fealty to Carloman. Excommunication by Pope John had little effect on him.{{Cite Newgenbio , title=Adalbert I , volume=1 , page=86 He married Rothild of Spoleto, daughter of

Guy I of Spoleto Guy I (died 860) was the Duke of Spoleto from 842. He was the son of Lambert I of Nantes and Adelaide of Lombardy, the eldest daughter of Pepin of Italy. He travelled with his father in 834 in the entourage of Lothair I. He was given the abbey of ...

{{sfn, Reuter, 1999, p=702 and sister of Lambert I and Guy III. He died in 884 or, more probably 886, and was succeeded by his son Adalbert II.

References

{{reflist

Sources

*{{cite book , title=The New Cambridge Medieval History , volume=3, C.900-c.1024 , publisher=Cambridge University Press , editor-first=Timothy , editor-last=Reuter , year=1999 {{s-start {{s-bef, before= Aganus {{s-ttl, title=

Margrave of Tuscany The rulers of Tuscany varied over time, sometimes being margraves, the rulers of handfuls of border counties and sometimes the heads of the most important family of the region. Margraves of Tuscany, 812–1197 House of Boniface :These were origin ...

, years=847–886 {{s-aft, after= Adalbert II {{s-end {{DEFAULTSORT:Adalbert 01, Margrave of Tuscany 820s births Year of birth uncertain 886 deaths Adalbert 1 House of Boniface {{Italy-noble-stub