III the White and Władysław, thereby establishing the Duchy of Wrocław proper. The subdivision of the Silesian duchies increased over the following generations and accompanied the fragmentation of Poland. Henry's III son Henry IV Probus upon the death of his uncle Władysław in 1270 ruled at Wrocław and in 1288 even became High Duke of Poland, until the male line became extinct with his death in 1290. He was succeeded by his cousin Duke Henry V the Fat, son of Henry's III brother Bolesław II, who once again re-united the duchies of Wrocław and Legnica under his personal rule. Nevertheless, upon his death in 1296, his heritage was again partitioned among his sons. The second, Duke Henry VI the Good, in order to ward off claims raised by his elder brother Duke Bolesław III the Generous of Legnica, in 1327 signed an inheritance treaty with King John of Bohemia, like most of the Silesian duchies had been vassalized by the Kingdom of Bohemia in the early 14th century. As the Polish king Casimir III in the 1335 Treaty of Trentschin had renounced Silesia, Henry's VI duchy passed without opposition to the Bohemian kingdom when he died without male heirs three months later. Silesia was incorporated into the Lands of the Bohemian Crown, after King Casimir III had acknowledged the acquisition by the 1348 Treaty of Namslau with King Charles IV — except for the Upper Silesian duchies of Oświęcim and Zator, which in the 16th century were integrated in the Polish Kraków Voivodeship, as well as the Duchy of Siewierz, that was purchased by the Archbishop of Kraków in 1443. Dukes Władysław the Exile (1138–1146), progenitor of the Silesian Piasts, also High Duke of Poland, deposed Bolesław the Curly (1146–1163), stepbrother Bolesław I the Tall, eldest son of Władysław, re-installed (1163–1201) Henry I the Bearded (1201–1238), son, also High Duke of Poland from 1232 Henry II the Pious (1238–1241), son, also High Duke of Poland, killed in Battle of Legnica Bolesław II the Bald (1241–1248), son, became Duke of Legnica in 1248 partition Henry III the White (1248–1266), brother, jointly with Władysław (1248–1270), brother, also Prince-Archbishop of Salzburg from 1265 Henry IV Probus (1266–1290), son of Henry III, Duke of Wrocław from 1270, also High Duke of Poland from 1288, no issue Henry V the Fat (1290–1296), son of Bolesław II, Duke of Legnica since 1278 Henry VI the Good