Denier - Premislaus I and Bolesław the Pious Gniezno mint

This denier falls within the condominium period when Przemysł I and Bolesław the Pious ruled Greater Poland jointly following the death of their father Władysław Odonic in 1239. The arrangement was unusual — two adult Piast brothers governing the same duchy without formal territorial partition until 1247, when they divided their holdings along lines that would define regional politics for decades.

Kopicki 144 is among the harder attributions in early Polish medieval coinage; the Gniezno mint's output from this period overlaps uncomfortably with Poznań issues, and correct attribution often hinges on die-link analysis rather than stylistic grounds alone.