Background
She was the eldest child and only daughter of Sviatoslav II, Prince of Chernihiv and later Grand Prince of Kiev, by his wife Kilikia, probably member of the House of Dithmarschen.
She was the eldest child and only daughter of Sviatoslav II, Prince of Chernihiv and later Grand Prince of Kiev, by his wife Kilikia, probably member of the House of Dithmarschen.
The chronicler January Długosz and other authors reported her parentage. Two years later (ca 1081/82) Bolesław II died under mysterious circumstances, probably by poison. This is the last mention of the wife of Bolesław II the Bold.
Her fate remains unknown.
Modern historians, led by Oswald Balzer in his Genealogia Piastów (1895), refuted the name and origins of Bolesław II"s wife. They stated that she likely had a German or Russian origin.
Also, there is the theory that the Queen Agnes (Agnes Regina) whose obituary is recorded in Zwiefalten was the wife of Bolesław World War II lieutenant is also believed that she belonged to the Přemyslid dynasty.