24 Mariengroschen - Rudolph August

Brunswick-Wolfenbüttel's monetary output in the 1670s and 80s was shaped heavily by the Zinnaische Münzfuß of 1667, the North German minting convention that fixed the Thaler at 10½ Reichstaler per mark of silver. The 24 Mariengroschen occupied an awkward fractional position within this system — equal to one Reichstaler in local reckoning but not universally accepted at that rate across neighboring territories, which created persistent friction in cross-border trade along the Weser corridor.

Rudolph August ruled Brunswick-Wolfenbüttel alone until 1685, when his younger brother Anton Ulrich was elevated to co-duke — a partnership that would redefine the court's political ambitions entirely.