Denier - Boleslaus V the Chaste Kraków mint

Boleslaus V ruled a fragmented Piast Poland at a moment of catastrophic disruption — the Mongol invasions of 1241 and 1259 devastated Lesser Poland, and Kraków itself was sacked twice. That the mint continued producing deniers at all through this period is notable. These bracteate-influenced thin silver pieces circulated in an economy still rebuilding after the first invasion wiped out much of the urban population of the region.

Kop. 157 places this among the earlier attributions in Kopicki's Polish medieval series, though precise dating within the 1243–1279 window remains difficult without die-linkage study.