4 Mariengroschen - Rudolph August

Rudolph August ruled Brunswick-Wolfenbüttel from 1666 until his brother Anton Ulrich was made co-ruler in 1685, and the coinage of this period reflects the principality's determined effort to maintain a functioning small-denomination silver currency during years of post-Thirty Years' War economic fragmentation across the Lower Saxon Circle. The Mariengroschen — named for the Virgin Mary — was a regional accounting unit deeply embedded in Brunswick monetary practice, and the 4 Mariengroschen denomination filled a specific transactional gap between the Groschen and the larger Thaler fractions.

Welter 1857A distinguishes a die variant within this emission worth noting when attributing examples.