Agnes of Poland
Agnes was the penultimate child and youngest daughter of Duke Bolesław Wrymouth of Poland and his second wife, Salomea of Berg.The date of birth is known thanks to Ortlieb, benedictine monk of Zwiefalten who visited the court of Dowager Duchess Salomea in Łęczyca between 1140 and early 1141; in his reports, he mentioned that Agnes was three years old.[3] In 1141 Salomea of Berg organized a meeting in Łęczyca, where his eldest sons (Bolesław IV and Mieszko III), and the lords had to decide, among other things, the future of Agnes.Further confirmation of this fact is that Mstislav's eldest son was called nephew of Casimir II the Just, and the relationship existing between Roman the Great and Leszek the White is described as the second-degree cousins.[10] After Grand Prince Iziaslav II's death, Mstislav lost his Principality of Pereyaslavl (1155) and took refuge with his wife in Poland.