1 Ducat - Frederick Ulrich

Frederick Ulrich's reign over Brunswick-Wolfenbüttel was defined less by governance than by catastrophe. The Thirty Years' War had already carved through Lower Saxony by the mid-1620s, and Tilly's Catholic League forces occupied Wolfenbüttel itself in 1627 — just after this ducat was struck. Gold issues from this precise window are scarce partly because the principality's finances were in serious disarray and partly because much of what was minted was spent almost immediately on military obligations Frederick Ulrich could barely meet.

He died in 1634 without an heir, extinguishing the main Wolfenbüttel line entirely.