Denier - Boleslaus I the Brave unknown mint

Boleslaus I secured a royal coronation in 1025 — the very last year of this issue's possible date range — after decades of maneuvering against both the Holy Roman Empire and the Piast dynasty's internal rivals. His earliest deniers, struck sometime after the Congress of Gniezno in 1000 where Otto III effectively recognized Polish quasi-regal status, represent the first coinage issued under anything resembling a sovereign Polish authority. The mint attribution remains unresolved; Gniezno and Poznań are the leading candidates, though die studies have not produced a definitive answer.