100zł The Millennium of the Coronation of Bolesław the Brave

The first-ever silver coin in the shape of a cuboid, measuring 29 x 29 x 35.5 mm and weighing 10 ounces (311 grams), issued in an ultra-limited mintage of only 1,025 pieces.

The coin commemorating the millennium of the coronation of Bolesław the Brave is a tribute to one of the most significant moments in Polish history. It marked a clear signal to the contemporary world that the young Polish state, having transformed from a duchy into a kingdom, was sovereign and independent. For the emerging Polish community, this event fostered a sense of equality among the nations of Europe.