12 Mariengroschen - Rudolph August and Anthony Ulrich

Brunswick-Wolfenbüttel's joint rule by Rudolph August and Anthony Ulrich was an awkward constitutional arrangement — Rudolph August held the senior title but Anthony Ulrich dominated cultural and political life, eventually forcing his brother into a purely nominal role by the early 1700s. Coinage issued under both names belongs to a narrow window before that effective displacement.

The Mariengroschen denomination, named for the Virgin Mary imagery traditional to Lower Saxon coinage, was a workhorse of regional commerce in the Holy Roman Empire's fragmented currency environment. By 1696, the 12 Mariengroschen piece functioned as a convenient fraction of the Thaler in local trade.