Conrad I, Duke of Zähringen

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Conrad I
Duke of Zähringen
Conrad of Zähringen bestowing the city rights to Freiburg.
Bornc. 1090
Died(1152-01-08)8 January 1152
BuriedAbbey of Saint Peter in the Black Forest
Noble familyHouse of Zähringen
Spouse(s)Clementia of Luxembourg-Namur
IssueBerthold IV
Adalbert I
Clementia of Zähringen
Rudolf of Zähringen
FatherBerthold II, Duke of Swabia
MotherAgnes of Rheinfelden

Conrad I (c. 1090 – 8 January 1152) was Duke of Zähringen from 1122 until his death and from 1127 also Rector of Burgundy. He spent most of his life stemming the growing power of the House of Hohenstaufen and to this end, allied himself with the House of Guelph.


Conrad I was a son of Duke Berthold II and his wife, Agnes of Rheinfelden.[1] In 1120, Conrad I and his elder brother Berthold III granted city rights to Freiburg. In 1122, Conrad I succeeded Berthold III as Duke of Zähringen.

In 1127, he came into conflict with Count Reginald III of Burgundy, because both men claimed the inheritance of Conrad's murdered nephew William III. In this situation, he benefitted from the situation Emperor Lothar III found himself in. Lothar urgently needed support against his Hohenstaufen rivals, and he supported Conrad's claim. He rejected Reginald's claim, with the dubious argument that Reginald had failed to comply with his duty to attend the emperor's court. Conrad received the title rector of Burgundy, which denoted, as least theoretically, a kind of representative of the emperor in the Kingdom of Burgundy.

In 1138, King Conrad III of Germany grabbed power and the power conflict between the Guelphs and the Hohenstaufen relaxed. Until the late 1150s, the dukes of Zähringen were among the Hohenstaufen's most loyal supporters.

Conrad I died in 1152 in Constance and was buried in the family vault in the Abbey of Saint Peter in the Black Forest.

Marriage and issue[edit]

Conrad was married to Clementia of Namur, daughter of Godfrey I, Count of Namur and had at least five children:


  1. ^ Hugo named himself for his seat in Ullenburg, and he inherited possessions in Breisgau and Ortenau. He also used the title of dux (even though there is no "Duchy of Ullenburg").[2]


  1. ^ a b c d e f Lyon 2013, p. 249.
  2. ^ Zotz 2018, p. 170.


  • Lyon, Jonathan R. (2013). Princely Brother and Sisters: The Sibling Bond in German Politics, 1100-1250. Cornell University Press.
  • Zotz, Thomas (2018). Die Zähringer: Dynastie und Herrschaft. W. Kohlhammer. ISBN 9783170309739.
  • Eberhard Holz and Wolfgang Huschner (eds.): Deutsche Fürsten des Mittelalters, Edition Leipzig, Leipzig, 1995, ISBN 3-361-00437-3
  • Georg von Wyß (1882), "Konrad (Herzog von Zähringen)", Allgemeine Deutsche Biographie (in German), vol. 16, Leipzig: Duncker & Humblot, pp. 634–638
Conrad I, Duke of Zähringen
Born: c. 1090 Died: 8 January 1152
Preceded by Duke of Zähringen
Succeeded by