Ziemomysł of Kuyavia
On 21 February 1257, Ziemomysł's mother, Constance died. His father soon remarried to Euphrosyne of Opole, with whom he had four children. Euphrosyne knew that when Casimir died, Ziemomysł and his older brother, Leszek II the Black, would inherit most of their father's lands, leaving her sons with very little. She therefore wanted to get rid of the two boys so her sons would be able able to inherit the Duchy of Kuyavia. There was an unsuccessful attempt to poison the boys.
After Casmir died in 1267, Ziemomysł inherited Kuyavia, and his brother Leszek became a pretender to the throne of Poland. The small duchy survived the considerable strength of Přemysl Otakar II of Bohemia, and there was soon a crusade against pagan Lithuania.
Ziemomysł developed close contacts with the Teutonic Order and Sambor II, Duke of Pomerania. When Sambor II loaned Ziemomysł some German knights, a rebellion broke out among the Duke's subjects. The rebels called on Boleslaw the Pious to help them. Boleslaw took Radziejów, Kruszwica and the castle in Bydgoszcz. Only through rapid action did Ziemomysł regain temporary control of his lands.
In 1271, Ziemomysł was involved in the war of Gdansk-Pomerania, in which he supported his new father-in-law, Sambor II against Mestwin II, Duke of Pomerania. His decision to fight in this battle triggered another invasion by Boleslaw the Pious. Ziemomysł was now forced into exile.
Ziemomysł was given back Kuyavia and his other lands in 1278, as a result of an agreement with Boleslaw the Pious and Leszek the Black, Which required Ziemomysł to distance himself from his German advisors.
To improve Ziemomysł's situation, there was an agreement, in which he was given back custody of Radziejów. His brother ended his pro-German policies in 1284, making the Teutonic Order hostile to the family. The details of the conflict are not known.
Ziemomysł died in the last quarter of 1287. He was presumably buried somewhere in the capital of the duchy, Inowroclaw. His widow Salome and his half-brother Ladislaus the Short were given custody of his children.
Marriage and children
- Euphemia (died c. 1278), died young
- Fenenna (c. 1278 – 1295) married Andrew III of Hungary and had a daughter Elizabeth
- Leszek (1275/76 – after 27 April 1339), Duke of Kuyavia
- Przemysł (1276/79 – before 16 February 1339), Prince of Sieradz
- Casimir (1277/80 – 22 August 1345/13 May 1350]), Duke of Kuyavia and grandfather to Elizabeth of Bosnia.
- Constance (d. 1331), nun 
|Ancestors of Ziemomysł of Kuyavia|