4 Ducats - Johann Christian and Georg Rudolf

The 1621 date places this coin squarely at the outbreak of the Thirty Years' War, when Silesia's Protestant estates were scrambling to assert autonomy against Habsburg pressure following the Battle of White Mountain the previous November. Johann Christian and Georg Rudolf were brothers ruling jointly under the Piast dynasty's final Silesian line — a co-rulership arrangement that produces the dual portrait issues collectors now chase. Large gold multiples like this four-ducat piece were almost certainly struck for presentation rather than commerce, distributed as diplomatic gifts or court largesse rather than ever passing through a merchant's hands.

FuS 1547 is among the rarer die pairings in the Liegnitz-Brieg sequence for this year.