Denier Bracteate - Mieszko III the Old Gniezno or Kalisz mint

Mieszko III ruled Greater Poland twice — expelled by his own nobles in 1177, he spent decades in political exile before reclaiming power, and his bracteate issues span both periods of rule, making precise attribution of individual dies to specific years essentially impossible. These thin, single-sided strikes were produced by hammering a flan so fine that the reverse is a mirror intaglio of the obverse — a technique that demanded skilled die-cutters but minimal silver, convenient for a duke whose treasury was repeatedly strained by dynastic warfare among the fragmented Piast succession.

The assignment between Gniezno and Kalisz remains unresolved in the literature; Kopicki 114 groups them together precisely because no archaeological find-spot evidence has yet separated them conclusively.