1 Ducat - August Philip Accession

August Philip von Limburg-Stirum became Prince-Bishop of Speyer in 1770, and this ducat was struck to mark that accession — a routine but politically loaded ceremony in an ecclesiastical principality where the chapter's election required imperial confirmation. The Bishopric of Speyer, already diminished in temporal power after the Thirty Years' War reshaped the Rhine territories, would survive August Philip's episcopate by barely two decades before the French Revolutionary forces suppressed it entirely in 1803.