Denier - Boleslaus I the Brave unknown mint

Boleslaus I secured a remarkable concession at the Congress of Gniezno in 1000 AD, when Otto III granted him the right to establish independent Polish bishoprics — a political breakthrough that almost certainly preceded or enabled the minting of native Polish coinage. Whether this denier was struck before or after Boleslaus formally crowned himself King in 1025, just months before his death, remains unresolved. The "unknown mint" attribution reflects genuine scholarly uncertainty; Poznań, Gniezno, and Wrocław have all been proposed.