Bolesław I the Tall was Duke of Wroclaw from 1163 until his death in 1201.
Fragmentation of the Duchy of Silesia begins. Period 1172/3–1177 Bolesław I the Tall Jarosław Opolski Mieszko I Tanglefoot
Władysław II the Exile was the high duke of Poland and duke of Silesia from 1138 until his expulsion in 1146. He is the progenitor of the Silesian Piasts.
Poland in 1138: Seniorate Province (with Pomerelia) in red, Silesia in violet
Władysław II as depicted in 1888 by Ksawery Pillati
Altenburg Castle