Boy discovers 17th-century coin at Polish castle
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A nine-year-old boy exploring Czersk Castle in Poland discovered a silver Prussian half-groschen from 1624.
The coin, weighing less than one gram, was minted in Königsberg (now Kaliningrad) and used for everyday transactions. The Mazovian Regional Conservator of Monuments noted the coin offers valuable insight into 17th-century life and currency circulation in Polish lands.
Czersk Castle, built between the 14th and 15th centuries by Duke Janusz the Elder, stands on the site of an earlier settlement near Góra Kalwaria in the Mazovia region of Poland. Though damaged over time, the castle’s towers still demonstrate the region’s history. The castle is now open to tourists, and the conservator praised the boy’s observation skills and responsible behavior in reporting his find.
