It is a denarius of Boleslaus II of Bohemia, who ruled in 972–999. On its obverse there is the ruler’s name surrounding the cross, while on the reverse there is a schematic representation of the chapel surrounded with an inscription: “PRAGA CIVITA”. Similar coins were issued by his father Boleslaus I and denarius with an inscription “VRATSAO” is told to be created by him. If we assume that the name refers to Wrocław, as some historians claim, then the origin of the city can be seen in this small relic.

Certainly we will never be sure whether the name of Wrocław originates from the name of a Bohemian Prince Vratislau, who supposedly built the first castle on the Oder island, or not. The truth is that in Silesia objects of everyday use were discovered and they may originate from Bohemia, however scholars still have disputes regarding their interpretation – whether they constitute proof of demographic presence of Bohemians in Silesia in the 10th century or they appeared there as a result of trade.