33 | Country divided, ruler of a DuchyUsurped | Piast |- | DukeDytrykalso Dietrich and Theoderick10321033 ( years) | | Son of Lambert Mieszkowic or Mieszko Mieszkowic | Unknown | Aged about 41 | Country divided, ruler of a DuchyUsurped | Piast |- | DukeMieszko II Lambert10331034( years) | | Son of Bolesław I the Brave and Emnilda of Lusatia | Richeza of Lotharingia, 4 children | 10/11 May 1034PoznańAged about 44 | Restored as duke | Piast |- | DukeBolesław the Forgotten10341038/1039( years) | | before 1016Presumed son of Mieszko II Lambert | Unknown | 1038/1039 | Semi-legendary, existence disputed | Piast |- | DukeCasimir I the Restorer1034/10401058( years) | | 25 July 1016Son of Mieszko II Lambert and Richeza of Lotharingia | Maria Dobroniega, 5 children | 19 March 1058PoznańAged 41 | Made prince in 1034, returned from abroad in 1040Restoration | Piast |- | KingBolesław II the Generous10581076 (as duke)26 December 10761079 (as king)( years) | | 1042Son of Casimir I the Restorer and Maria Dobroniega | Wyszesława, 1 son | 2/3 April 1081Hungary or OssiachAged about 39 | Crowned king in 1076Deposed and exiled in 1079 after slaying Saint Stanislaus | Piast |- | DukeWładysław I Herman10794 June 1102( years) | | 1044Son of Casimir I the Restorer and Maria Dobroniega | Przecława Judith of Bohemia Judith of Swabia | 24 June 1102PłockAged about 58 | Succeeded brother after his exile | Piast |- | DukeZbigniew11021107( years) | | Son of Władysław I Herman and Przecława (?) | Unknown | 8 July 1113Aged about 40 | Succession | Piast |- | DukeBolesław III Wrymouthalso Boleslaus III11071138( years) | | 20 August 1086PłockSon of Władysław I Herman and Judith of Bohemia | Zbyslava of Kiev Salomea of Berg | 28 October 1138SochaczewAged 52 | SuccessionHis death led to the fragmentation of Poland | Piast |} Fragmentation of Poland (1138–1320) |- | High DukeWładysław II the Exile11381146( years) | | 1105KrakówSon of Bolesław III Wrymouth and Zbyslava of Kiev | Agnes of Babenberg, 5 children | 30 May 1159AltenburgAged 54 | SuccessionDeposed and exiled | Piast |- | High DukeBolesław IV the Curly11461173( years) | | Son of Bolesław III Wrymouth and Salomea of Berg | Viacheslava of Novgorod, 3 children | 5 January 1173Aged about 51 | Succeeded exiled half-brother | Piast |- | High DukeMieszko III the Old11731177( years) | | Son of Bolesław III Wrymouth