Conrad I, Duke of Zähringen

Conrad I, Duke of Zähringen
Konrad von Zaehringen.jpg
Conrad I grants city rights to Freiburg, stained glass by Fritz Geiges, 1899
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
FatherBerthold II, Duke of Swabia
MotherAgnes of Rheinfelden
Conrad I, relief by Franz Xaver Anton Hauser in the Freiburg Minster

Conrad I, Duke of Zähringen (c. 1090 – 8 January 1152 in Constance) 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 Renaud 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 III urgently needed support against his Hohenstaufen rivals, and he supported Conrad's claim. He rejected Renaud's claim, with the dubious argument that Renaud 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 and was buried in the family vault in the Abbey of Saint Peter in the Black Forest.

Marriage and issue[]

Conrad was married to Clementia of Luxembourg-Namur and had at least five children:


  1. ^ a b c d e f Lyon 2013, p. 249.
  2. ^ 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"). Th. Zotz, Die Zähringer: Dynastie und Herrschaft (2018), p. 170.
Conrad I, Duke of Zähringen
Born: c. 1090 Died: 8 January 1152
Preceded by
Berthold III
Duke of Zähringen
Succeeded by
Berthold IV