Denier - William I Utrecht

William I became Bishop of Utrecht in 1054 as a direct appointment by Henry III, Holy Roman Emperor — the bishopric functioned as an imperial church institution, and its coinage rights were firmly embedded in that relationship. His episcopate ended with his death in 1076, the same year the Investiture Controversy reached its breaking point with Gregory VII's excommunication of Henry IV at Canossa. Utrecht's mint output during this period was substantial; the bishopric controlled one of the most economically active regions of the Low Countries, and silver deniers circulated widely through Rhine trade networks.

The Ilisch NL1 reference places this precisely within the north Low Countries series, a classification that has helped resolve longstanding attribution disputes over similar episcopal issues from Liège and Cologne.