Is the Penny of the Stroncz. 54 type a Coin in the Name of Duke Bolesław IV the Curly? On the Penny Coinage Issued in Silesia in the Second Half of the 12th Century

The article deals with the penny coinage minted in Silesia in the latter half of the 12th century. According to the author, it is very likely that the Polish coinage of Silesia during the period of feudal fragmentation had originated under the rule of two Silesian Piast dukes, brothers Bolesław I the Tall and Mieszko IV Tanglefoot (in the period 1166–1172), responsible for several penny types issued up until the late 12th century and subjected to periodic recoinage. It is also possible that the first two types may have been minted by the Senior Duke Bolesław IV the Curly, although the author believes that this hypothesis is less plausible.