Pfennig - Henry IV of Isny

Henry IV of Isny served as Bishop of Basel from 1275 to 1286, a tenure marked by persistent conflict with the city's burghers over municipal autonomy — tensions that would eventually force episcopal authority out of Basel altogether in the following century. This bracteate-style pfennig belongs to a regional coinage tradition that was already fragmenting badly by this period, with secular and ecclesiastical mints competing within overlapping territories across the upper Rhine.

Wielandt's Breisgau reference places this type firmly in the southwestern German circulation zone rather than the city proper.