Casimir II the Just
The last mention of Agnes as a living person comes from the "Chronica Poloniae" of Wincenty Kadłubek. Sviatoslav, Prince of Brest, was exiled by his half-brothers as a result of the allegations that he was illegitimate. Then Casimir II the Just invaded Brest and restored him in his domains. The "Chronicle of the Chapter of Kraków" informs about an expedition of Casimir II into Kievan Rus' in 1182.