Wartislaw I

[2] The last time he is mentioned explicitly in chronicles is by Saxo Grammaticus who describes a joint Polish-Danish expedition against Wartislaw around 1129/1130, which was directed at the islands of Wolin and Uznam.

The Pomeranian chronicler Thomas Kantzow, writing almost four hundred years later, states that Wartislaw was married to a Heila from Saxony.

She is supposed to have died in 1128 and the following year the Duke married Ida, the daughter of Niels of Denmark or of Canute Lavard (Kanztow changed his chronicles in subsequent editions in this respect).

Edward Rymar argues that if Wartislaw had indeed been married to a German princess then sources such as the life of Otto would have surely mentioned that fact.

The site of Wartislaw's death near Stolpe in the modern district of Vorpommern-Greifswald, where he is said to be slain by pagans, is marked by a rock called Wartislawstein with an engraved Christian cross in remembrance of his missionary efforts.