1 Thaler - Frederick William of Weilburg Konventionstaler, Pattern

Nassau-Weilburg's 1815 Konventionstaler pattern was struck in the immediate aftermath of the Congress of Vienna, when the reorganization of German territories left dozens of minor states scrambling to assert independent coining rights before political consolidation rendered them moot. Frederick William had ruled since 1788 and would die just two years after this piece was struck, leaving Nassau-Weilburg to be absorbed into the broader Duchy of Nassau in 1816 — meaning this pattern never progressed to a circulation issue under his authority.

Thun 224 is the standard reference; Kahnt's attribution confirms pattern status.