title of Rector of Burgundy in 1127, and they continued to use both titles until the extinction of the ducal line in 1218.

The territories and fiefs held by the Zähringer were known as the Duchy of Zähringen (German: [[Herzog]]tum Zähringen), but it was not seen as a duchy in equal standing with the old stem duchies. The Zähringer attempted to expand their territories in