| Notes |
- Berengar was a son of Margrave Adalbert I of Ivrea and his wife Gisela of Friuli, daughter of the Unruoching king Berengar I of Italy. He thereby was a direct descendant of the Carolingian emperor Louis the Pious in the female line. He succeeded his father as margrave about 923 and married Willa, daughter of the Bosonid margrave Boso of Tuscany and niece of King Hugh of Italy. The chronicler Liutprand of Cremona, raised at Berengar's court at Pavia, gives several particularly vivid accounts of her character.
About 940 Berengar led a revolt of Italian nobles against the rule of his uncle. To evade an assault by Hugh's liensmen, he, forewarned by the king's young son Lothair, had to flee to the court of King Otto I of Germany. Otto avoided taking sides, nevertheless in 845 Berengar could return to Italy with hired troops, welcomed by the local nobility. Hugh was defeated and retired to Arles, he was nominally succeeded by Lothair. From the time of Berengar's successful uprising, all real power and patronage in the Kingdom of Italy was concentrated in his hands with Hugh's son Lothair as titular king. Lothair's brief reign ended upon his early death in 950, presumably poisoned.
Berengar then assumed the royal title with his son Adalbert as co-ruler. He attempted to legitimize his kingship by forcing Lothair's widow Adelaide, the respective daughter, daughter-in-law, and widow of the last three Italian kings, into marriage with Adalbert. However, the young woman fiercely refused, whereafter Berengar had her imprisoned at Garda Castle, allegedly mistreated by Berengars's wife Willa. With the help of Count Adalbert Atto of Canossa she managed to flee and entreated the protection of King Otto of Germany. Otto, himself a widower since 946, took the occasion to gain the Iron Crown of Lombardy: Adelaide's requests for intervention resulted in his 951 invasion of Italy. Berengar had to entrench himself at San Marino, while Otto received the homage of the Italian nobility, married Adelaide himself, and assumed the title of a King of the Lombards. He afterwards returned to Germany, appointing his son-in-law Conrad the Red Italian regent at Pavia.
Berengar by Conrad's agency appeared at the 952 Reichstag in Augsburg and paid homage to Otto. He and his son Adalbert remained Italian kings as Otto's vassals, though they had to cede the territory of the former March of Friuli to him, which the German king enfeoffed to his younger brother Duke Henry I of Bavaria as the Imperial March of Verona.
Berengar remained a rebellious subordinate: when Otto had to deal with the revolt of his son Duke Liudolf of Swabia in 953, he attacked the Veronese march and also laid siege to Count Adalbert Atto's Canossa Castle. After 960, he even invaded the Papal States under Pope John XII, on whose appeal finally KIng Otto, aiming at his coronation as Holy Roman Emperor, again marched against Italy. Berengar's troops deserted him and Otto by Christmas 961 had taken Pavia by default and declared Berengar deposed. He proceeded to Rome, where he was crowned emperor on 2 February 962. He then once more turned against Berengar, who was besieged at San Leo.
Meanwhile Pope John had entered on negotiations with Berengar's son Adalbert, which in 963 caused Otto to move into Rome, where he deposed the pope and had Leo VIII elected. The next year, Berengar finally surrendered to Otto's forces, he was captured and imprisoned at Bamberg in Germany, where he died in 966. His wife Willa spent the rest of her life in a German nunnery.
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Abt 900 - 966 (~ 66 years)
