Sunderolt (or Sunderhold) (died 25 June 891) was the

Archbishop of Mainz The Elector of Mainz was one of the seven Prince-electors of the Holy Roman Empire. As both the Archbishop of Mainz and the ruling prince of the Electorate of Mainz, the Elector of Mainz held a powerful position during the Middle Ages. The Archb ...

from 889 until his death. Sunderolt had not held the primatial see of Germany for long when a

Viking Vikings ; non, víkingr is the modern name given to seafaring people originally from Scandinavia (present-day Denmark, Norway and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded and s ...

invasion of

West Francia In medieval history, West Francia (Medieval Latin: ) or the Kingdom of the West Franks () refers to the western part of the Frankish Empire established by Charlemagne. It represents the earliest stage of the Kingdom of France, lasting from about ...

attracted his attention. He led an army of

Rhenish The Rhineland (german: Rheinland; french: Rhénanie; nl, Rijnland; ksh, Rhingland; Latinised name: ''Rhenania'') is a loosely defined area of Western Germany along the Rhine, chiefly its middle section. Term Historically, the Rhinelands ...

and

Lotharingia Lotharingia ( la, regnum Lotharii regnum Lothariense Lotharingia; french: Lotharingie; german: Reich des Lothar Lotharingien Mittelreich; nl, Lotharingen) was a short-lived medieval successor kingdom of the Carolingian Empire. As a more durable ...

n troops against the Vikings. He was killed in the ensuing battle, for which the ''

Annales Fuldenses The ''Annales Fuldenses'' or ''Annals of Fulda'' are East Frankish chronicles that cover independently the period from the last years of Louis the Pious (died 840) to shortly after the end of effective Carolingian rule in East Francia with the ...

'' castigated his rashness. He was succeeded by

Hatto I Hatto I (c. 850 – 15 May 913) was Archbishop of Mainz (Mayence) from 891 until his death. Hatto belonged to a Swabian family, and was probably educated at the monastery of Reichenau, of which he became abbot in 888. He was also abbot of Ellwa ...

of Reichenau.

Sources

*
The Annals of Fulda
'. (Manchester Medieval series, Ninth-Century Histories, Volume II.) Reuter, Timothy (trans.) Manchester: Manchester University Press, 1992.
891 deaths Archbishops of Mainz 9th-century archbishops Military personnel killed in action Year of birth unknown {{RC-archbishop-stub