Denier Bracteate - Diethelm of Krenkingen and Werner of Staufen

The Bishopric of Constance was one of the largest dioceses in the medieval Latin church — at its territorial peak it stretched from Alsace to the Inn River — yet its coinages from this period remain poorly documented compared to its political weight. This bracteate was struck under a joint episcopal administration, reflecting the not uncommon practice of co-governance during disputed or transitional successions. Diethelm of Krenkingen held the see from 1165 to 1190; Werner of Staufen followed immediately after, suggesting this type spans the transition between them rather than a genuine co-episcopate.