1 Ducat

Frankfurt struck ducats continuously as a Free Imperial City exercising its mint rights under the Holy Roman Empire, and the years covered by this issue span the immediate aftermath of the Peace of Westphalia in 1648 — the settlement that ended the Thirty Years' War and left the Empire's monetary system fractured across hundreds of issuing authorities. Frankfurt's commercial dominance as a trade fair city meant its coinage circulated well beyond the city's own boundaries, accepted by merchants who trusted the .986 fineness over the issuing authority behind it.

Fr#976 distinguishes this as a variety within a longer Frankfurt ducat sequence. The Franckfurter Messen — the biannual trade fairs — drove consistent demand for high-purity gold coin through the mid-seventeenth century.