Overview
Anastasia of Greater Poland (; b. ca. 1164 – d. aft. 31 May 1240), was Duchess of Pomerania by marriage to Bogislaw I, Duke of Pomerania, and regent from 1187 until 1208 during the minority of her sons Bogislaw II and Casimir II .
Life
She was the youngest child of Mieszko III the Old, Duke of Greater Poland and since 1173 High Duke of Poland, by his second wife Eudoxia, daughter of Grand Prince Iziaslav II of Kiev.
Duchess
On 26 April 1177 Anastasia married Bogislaw I, Duke of Pomerania. This marriage reinforced the alliance between Mieszko III and his western neighbors, who started soon before with the marriage of Anastasia's older sister Salomea with Ratibor, the eldest of Bogislaw I's two sons born from his first marriage with Walburgis (who died before 18 April 1172). During her marriage, Anastasia bore her husband two other sons, Bogislaw in 1178 and Casimir around 1180.
The High Duke gained a faithful ally with this son-in-law, who was the only who supported him when he was exiled from Poland due to the rebellion of his eldest son (and Anastasia's half-brother) Odon. In 1181 Anastasia's father was able to reconquer Gniezno and Kalisz with the help of Duke Bogislaw I. They even took Poznań from Odon, who finally reconciled with his father one year later.
From Wikipedia (CC BY-SA 4.0).