|Intro||Duke of Zähringen and Rector of Burgundy|
|Birth||1 January 1090|
|Death||8 January 1152, Konstanz, Konstanz, Freiburg Government Region, Baden-Württemberg (aged 62 years)|
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. 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:
- Adalbert I, founder of the line Dukes of Teck
- Berthold IV, duke of Zähringen
- Clementia, married Henry the Lion
- Rudolf, Archbishop of Mainz
- Hugh, Duke of Ullenburg