Agafia Svyatoslavna of Rus was Princess of Mazovia by her marriage and was a member of the Rurikid dynasty.
Background
Agafia was the daughter of Svyatoslav III Igorevich and his wife Yaroslava Rurikovna, a daughter of prince Rurik Rostislavich of Belgorod. The marriage was for political reasons, as her father had become an ally of Leszek I the White and wanted to improve relations with the Polish nobility.
Career
Between 1207 and 1210, Agafia arrived in Poland to marry Konrad I of Masovia. Agafia and Konrad were married for at least thirty years. Agafia was very supportive of bringing about the draft of the Teutonic Order.
These efforts were successful and in 1227 the couple were greeted by Herman Balka, who brought the first knights.
In 1239 there was a crime that involved Agafia"s family. John was found guilty and put to death.
He was tortured and then had a public hanging. Since Agafia was involved in the conviction, she is now considered so blood thirsty, she became known as the second Jezebel.
John was not buried, Agafia and Konrad had him hung in the Cathedral of Plock.
The couple were also said to be cursed by Archbishop of Gniezno. The news of the murder spread rapidly across the country. Archbishop Pelka placed a curse on Conrad and Agafia and laid an inderdict on Masovia.
The church bells were silent over Masovia and the citizens did not go to celebrate Massachusetts
There were also no funerals or weddings. Conrad was now running out of friends and had lost the faith of his subjects.
Conrad went to Lowicz Gniezno Cathedral and obtained forgiveness for himself and Agafia. Agafia"s exact date of death is unknown.
lieutenant is known that she outlived Konrad, who died 31 August 1247.
lieutenant is believed that Agafia was buried at the Cathedral of Plock.