page_title: Duchy of Greater Poland
section_title: History
hierarchical_section_title: Duchy of Greater Poland / History
caption_attribution_description: English: Fragmentation of Poland; various Duchies (dzielnice) are marked in various colors. Poland was split betweens the sons of Bolesław: &#160;&#160; The Seniorate Province, composed of the Eastern Greater Poland, Lesser Poland, Western Kuyavia, Łęczyca Land and Sieradz Land &#160;&#160; Silesian Province of Władysław II &#160;&#160; Masovian Province of Bolesław IV &#160;&#160; Greater Poland Province of Mieszko III &#160;&#160; Sandomir Province of Henryk &#160;&#160; Province of Bolesław's widow, Salomea, composed of Łęczyca Land - to revert to seniorate province upon her death &#160;&#160; Pomeranian vassals of the ruler of the seniorate province
context_page_description: The Duchy of Greater Poland was a historical Polish province established in 1138 according to the Testament of Bolesław III Krzywousty. It existed during the period of fragmentation of Poland until 1320, centered at Poznań, Gniezno and Kalisz in the Greater Poland region.
context_section_description: Upon the death of Polish Piast duke Bolesław III Wrymouth in 1138, his country was divided by his will into 4-5 hereditary provinces distributed among his sons. The late duke had also established the Seniorate Province of Kraków for the eldest Władysław II, designated high duke of whole Poland.
caption: Fragmentation of Poland in 1138:   Duchy of Greater Poland of Mieszko III
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