⅔ Thaler - Frederick I with his 6 brothers

Frederick I of Saxe-Gotha-Altenburg was the eldest of seven sons born to Ernest I ("the Pious"), whose death in 1675 triggered the partition of his duchy into seven separate sub-duchies — one of the most fragmented dynastic divisions in German territorial history. This ⅔ Thaler, struck across 1678–79, commemorates the brotherhood of those heirs at a moment when their political fates were already diverging. The format — grouping all seven brothers on a single coin — was a deliberate assertion of Ernestine unity that the actual partition had already undermined.