Counts · Other imperial lands · as at first light, 1 January 1200

Oldenburg

The counts of Oldenburg hold the castle on the Hunte, the Ammerland with their family abbey at Rastede, and lands toward the Weser and Delmenhorst.

Henry the Lion's vassals until his fall, they have gone their own way since 1180. They claim lordship over the Frisians of Rüstringen and the Stedinger marsh, where the Stedingers destroyed their castles of Lichtenberg and Linen in 1187. Moritz was Archbishop Hartwig's ally: the two led their troops into Dithmarschen in 1187 and 1188 (en.wikipedia Hartwig of Uthlede).

Their cousins of the Wildeshausen line hold the lands to the south.

Who he is

Name
Moritz (Mauritius) I
Title
count of Oldenburg
Since
not pinned (his father Christian I died 1167/68; his brother Christian was murdered at Bergedorf in 1192)
Born
not pinned
Family
son of Count Christian I and Kunigunde (alive 1194/98); married Salome of Wickrath. Children: Christian (III), Otto (I) (still a small child in 1209), Hedwig, Salome, Kunigunde, Oda; which were born by 1 January 1200 is not pinned. Dead by 1209.
Confidence
medium

FMG Oldenburg

Overlord

none resident: vassals of Henry the Lion until 1180, independent since

What it holds

  • Oldenburg castle and its settlement
  • the Ammerland (Rastede, Westerstede, Zwischenahn)
  • lands south-east toward Ganderkesee and Hude
  • claims over Rüstringen and the Stedinger marsh

How it was acquired

Inherited; independent since 1180.

Allies and rivals

Ally of Archbishop Hartwig II (Dithmarschen campaigns of 1187-88). Rivals: the Stedingers, the Frisians of Rüstringen. Kin: the Wildeshausen counts and their uncle Gerhard, bishop of Osnabrück.

How things stand that morning

Moritz holds Oldenburg and the Ammerland. Which king he backs is not pinned.

Wealth

Land, the Hunte crossing, marsh rents.

Military

Oldenburg castle; vassals of the Ammerland. Lost Lichtenberg and Linen to the Stedingers (1187).

Threats

  • the Stedingers
  • the archbishop of Bremen in the Weser marshes

Places of note

  • Oldenburg castle: the counts' seat
  • Rastede abbey: the counts' family monastery and burial place

Where the sources disagree

Evidence: FMG cites a charter of 1194/98 naming him count and one of 1209 calling him dead.

On the map: Rough block; the counts' rights east of the Hunte toward the Weser are uncertain.

Primary sources for Empire

Chronicles, registers, sagas and inscriptions written in or near 1200 that cover this entry. Each has its own page with editions, translations and where to read it.

8 more in the sources library for The Rhineland, the Low Countries and the Swiss Lands.

Sources and studies

  1. FMG Medieval Lands: Oldenburg
  2. Wikipedia (de): Grafschaft Oldenburg
  3. Wikipedia (de): Stedinger
  4. Wikipedia: Hartwig of Uthlede

Last revised 4 November 2026. Published 4 November 2026. Suggest a correction on the OMNIA Discord.