Denier Bracteate - Mieszko III the Old Gniezno or Kalisz mint

Mieszko III ruled longer than almost any Piast duke — twice expelled from Kraków and twice restored, his reign was defined by conflict with his own nobility rather than foreign enemies. These bracteates were struck during a period when Polish coinage had fragmented entirely along dynastic lines following the Testament of Bolesław III in 1138, which partitioned the kingdom among his sons and inaugurated a century and a half of division. The thin, single-sided fabric was not a regional quirk but a deliberate cost reduction widely adopted across fragmented German and Polish territories during the 12th century.

Attribution between Gniezno and Kalisz remains unresolved in the literature. Kopicki's single reference number accommodates both mints without distinguishing them.