Ziemomysł of Kuyavia

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Ziemomysł[1] of Inowrocław (Polish: Ziemomysł inowrocławski; c. 1245 – October/24 December 1287), was a Polish prince member of the House of Piast, Duke of Inowrocław during 1267-1271 and 1278-1287, and ruler over Bydgoszcz during 1267-1269 and 1278-1287.

He was the second son of Casimir I of Kuyavia and his second wife Constance, daughter of Henry II the Pious.


Early Years[edit]

In 1257 his mother died, and his father soon married for the third time with Euphrosyne, daughter of Casimir I of Opole. Ziemomysł's stepmother soon caused conflicts in the family with her attempts to obtain territorial benefits for her own children (the eldest of them was the future Polish king Władysław I the Elbow-high) in detriment of Ziemomysł and his older full-brother Leszek II the Black; some chronicles even accused Euphrosyne of attempting to poisoning both princes, however this wasn't proved.

Duke of Inowrocław[edit]

First Rule[edit]

After his father's death in 1267 Ziemomysł inherited the district of Inowrocław. At the beginning of his reign in the small principality, he mamaged to survived the invasion of the considerable forces of King Ottokar II of Bohemia, who was bounded to a Crusade against Lithuania. Was probably at this point that Ziemomysł established close contacts with the Teutonic Order and Sambor II, Duke of Pomerelia, alliances which soon brought to him serious troubles - the revolt of his own subjects.

The conflict clearly emerged after Sambor II (his father-in-law since 1268) loaned Ziemomysł some German knights. This preference to foreigners disliked the local knighthood,[2] and caused an armed conflict led by the Bishop of Kujawy, Wolimir, in 1269. The rebels called the very known anti-German Bolesław the Pious to help them. Bolesław took Radziejów, Kruszwica and the castle in Bydgoszcz. Only through rapid action did Ziemomysł and the grant to further privileges to Bishop Wolimir allowed him to regain temporary control of his lands.

In 1271, Ziemomysł was involved in the Pomerelian affairs, in which he supported father-in-law Sambor II against Mestwin II. This decision triggered another invasion of Bolesław the Pious, which combined with another revolt of his subjects forced Ziemomysł to escape.

Second Rule[edit]

Ziemomysł recovered his lands only in 1278 as a result of an agreement between Bolesław the Pious and Leszek II the Black in Ląd, where Leszek II returned Inowrocław to his brother only after he promised to take distance himself from all his German advisors. Despite the end of the conflict, Bolesław the Pious kept Radziejów and Kruszwica.

The complite normalization of his rule took place two years latr at the Congress of Rzepka, where after an agreement with Mestwin II, was stipulated that after his death the castellany of Wyszogród had to return to Inowrocław. The final break with his pro-German policy was in 1284, when Ziemomysł supported his brother Leszek II in a war against the Teutonic Order. The details of this conflict are unknown.

Ziemomysł also began the process of giving Town privileges to his subjects, endowing them upon Gniewkowo.

Ziemomysł died between October and 24 December 1287.[3] It's unkwown where he was buried, although is assumed that it happened in the capital of the duchy, Inowrocław.

Marriage and Issue[edit]

On 29 February 1268, Ziemomysł married Salome, daughter of Sambor II, Duke of Pomerelia.[4] They had six children:

  1. Euphemia (d. young, 3 March 1268/78).
  2. Fenenna (ca. 1268/77 – 1295) married Andrew III of Hungary.
  3. Constance (1268/80 – 8 August 1331), a nun.[5]
  4. Leszek (1275/76 – after 27 April 1339).
  5. Przemysł (ca. 1278 – November 1338/16 February 1339).
  6. Casimir III (1280/84 – 22 August 1345/13 May 1350).

Because his sons are minors at the time of his death, his widow and half-brother Władysław I the Elbow-high took the regency on their behalf.



  1. ^ The spelling Ziemomysł is more common than Siemomysł. It is in this form that it appears on the seal of his daughter, Fenenna. Cf. K. Jasiński, Pedigree of Little Poland and Kuyavian Piast, Poznan - Wroclaw 2001, p. 105.
  2. ^ Benedykt Zientara: Społeczeństwo Polski od X do XX wieku, 1999, p. 198.
  3. ^ Siemomysł (Siemaszko) Inowrocławski (Kujawski) in poczet.com [retrieved 18 February 2015].
  4. ^ Ziemomysl Piast
  5. ^ POLAND, Medieval Lands