6 Ducats - Christina

Christina's nominal sovereignty over Riga following Sweden's consolidation of Livonia gave the city mint a narrow window to produce prestige gold multiples, and the six-ducat denomination sat at the very top of that ambition. These large presentation pieces were almost certainly struck for diplomatic gift-giving rather than commerce — no economy runs on 20-gram gold multiples, and Riga's merchant class settled accounts in thalers.

The 1644 date places this squarely in the period before Christina's abdication crisis fully consumed Swedish court politics. Surviving examples are exceptionally rare; Neumann's census and Ahlström's agreement on a single reference number suggests the known population has never been large enough to argue about.