Denier Bracteate - Mieszko III the Old Gniezno or Kalisz mint

Mieszko III ruled Greater Poland twice — expelled by his own nobles in 1177, he clawed back power repeatedly over the next quarter century, a political instability that makes attributing his bracteate issues to specific mints genuinely difficult. The Gniezno and Kalisz attribution for Kop#107 reflects this uncertainty; both were active ducal mints under his authority at various points, and the die evidence does not cleanly separate them.

Bracteate production in Piast Poland replaced the earlier two-sided deniers not by design philosophy but by economic pressure — the coins were struck from a single die on thin sheet silver, dramatically reducing metal content per piece while maintaining nominal face value.