Dietrich of Haldensleben, Margrave of the Nordmark

Dietrich (Theoderich, Theodoric) of Haldensleben (died 25 August 985) was a Saxon count in the Schwabengau, later also in the Nordthüringgau and the Derlingau, who was the first Margrave of the Northern March from 965 until the Great Slav Rising of 983. He also bore the title of a dux (duke) in contemporary sources.


Probably a member of the Saxon House of Billung, Dietrich was the ancestor of a comital branch named after the residence of Haldensleben in Eastphalia. He may have been a son of Count Wichmann the Elder and Frederuna, sister of Queen Matilda, and held large estates along the Elbe and Saale rivers.

A henchman of the royal Ottonian dynasty, Dietrich in 953 supported King Otto I of Germany against his revolting son Duke Liudolf of Swabia. He also fought - without success - against the Polabian Slavs settling on the Elbe river at the eastern rim of his Eastphalian home territory. In return Otto, Holy Roman Emperor since 962, appointed him margrave in the Northern March beyond the Elbe, the largest part of the former Marca Geronis after its dissolution upon the death of Margrave Gero in 965.

Dietrich was a harsh overlord. Together with Archbishop Adalbert of Magdeburg he enforced the Christianization of the local Slavic population and was instrumental in the execution of his rival Gero, Count of Alsleben. Owing to his pride as stated by the chronicler Thietmar of Merseburg (he allegedly once refused the marriage of one of his kinswoman to a Slav "dog"), in 983 the Slavic Lutici and Hevelli tribes sacked the lands of the eastern bishoprics of Havelberg and Brandenburg and reverted to paganism. According to the medieval chroniclers Adam of Bremen and Annalista Saxo, Dietrich was deprived of his march in the same year, though he later again appeared as a Saxon general and supported the minor king King Otto III of Germany against the claims to the throne raised by the Bavarian duke Henry the Wrangler.

According to the Annals of Quedlinburg, Dietrich died on 25 August 985.


Dietrich married a woman of unknown name and they had the following children:

Dietrich was succeed as Margrave of the Nordmark by Lothar I in 983. His son Bernard became margrave in 1009.


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