1 Mariengulden - Frederick Ulrich

Frederick Ulrich's reign over Brunswick-Wolfenbüttel was administratively chaotic almost from the start — his court factions, disputed authority, and the grinding pressure of the Thirty Years' War all converged during precisely the years this coin was struck. The Mariengulden emerged from the so-called Kipper- und Wipperzeit, the currency debasement crisis of 1619–1623 that saw dozens of German mints flooding circulation with debased coinage. This piece, struck in honest silver, belongs to the corrective phase that followed.

Frederick Ulrich died in 1634 without a legitimate heir, extinguishing the Wolfenbüttel line and triggering a succession dispute that reshaped Brunswick's political geography for decades.