Silesian Piasts - line of Piast dynasty started by Władysław II the Exile, son of Bolesław III Wrymouth. Piast dynasty is the name used since the 17th century for Polish Royal Dynasty that ruled Poland from its beginnings as Duchy ruled by Mieszko This article refers to the 12th century Polish monarch For the 14th century founder of the Jagiellon dynasty see Jogaila, and for other monarchs with similar names Bolesław III Wrymouth ( Bolesław III Krzywousty) 1085 – 1138) was Duke of Poland from Silesian Piasts ruled over many Duchies of Silesia after fragmentation of Poland that begun in 1138. The Duchies of Silesia resulted from divisions of the original Duchy of Silesia after 1138. In the first centuries of its existence the Polish nation was led by a series of strong rulers who converted the Poles to Christendom, created a strong Central European The last Silesian Duke and Piast was George William, Duke of Liegnitz (d. In accordance with the last will and testament of Poland's Duke Bolesław III Wrymouth, Poland was upon his death divided into 4-5 hereditary provinces distributed among his George William (Georg Wilhelm I Jerzy IV Wilhelm September 29 1660 &ndash November 21 1675) was the last duke of Liegnitz 1675). The last male Silesian Piast was baron Ferdinand II von und zu Hohenstein (d. 1706).