Denier Bracteate - Swietopelk II the Great Gdańsk mint

Świętopełk II ruled Pomerania for nearly half a century, spending much of that time in open conflict with the Teutonic Knights and the Polish Piasts — occasionally allied with pagan Prussians when it suited him, a move that scandalized his contemporaries. The Gdańsk mint operated under his authority as he consolidated control over the lower Vistula delta, and bracteate production there reflects the broader Central European shift away from two-sided deniers toward single-sided struck types during the thirteenth century.

The 0.2 mm diameter figure in the data is almost certainly a recording error — bracteates of this type typically ran between 25 and 40 mm across on extremely thin planchets, their fragility explaining why undamaged survivors are scarce.