managed her own wealth. She is mentioned for the last time in 1361, when her brother Kęstutis escaped from Marienburg and sought refuge at his sister's house; historians put her date of death at around 1364. In 1337 Elzbieta's daughter Anna, first mentioned in late 1323, married Henry of Żagań, in modern-day western Poland. Her son Bolesław III or Bolko died without a male heir in 1351 and his land was divided among other dukes. Eufemija (also known as Marija, Ofka, and Anka) married Bolesław Jerzy II of Galicia, in modern-day Ukraine, in 1331. The marriage was engineered in 1323 when the brothers Lev and Andrew of Galicia were slain without leaving heirs. Instead of replacing them with his own son Liubartas and risking a war with Poland, Gediminas forged a compromise with Władysław I of Poland. Both parties agreed to install Bolesław, cousin of Władysław I and nephew of Gediminas' son-in-law Wacław of Płock, with the marriage to take place later. Bolesław at the time was fourteen years old. In this way the war for control of Galicia–Volhynia was postponed until after Bolesław's poisoning in 1340; control of the area was not stabilized until 1370. According to Teodor Narbutt, Eufemija was drowned beneath the ice of the Vistula River on 5 February 1342 in order to keep her out of the succession disputes. Aigusta was baptized as Anastasia in order to marry Simeon of Moscow in 1333; he became Grand Prince of Moscow in 1341. There is no direct evidence that she was a daughter of Gediminas, but because the marriage was high-profile, most historians have concluded that she was a member of Gediminas' family. The marriage had great potential because Lithuania and Moscow were fierce rivals for supremacy in Ruthenia, but conflicts broke out again in 1335, just two years after the marriage. Her two sons Vasilei and Konstantin did not survive infancy; her daughter Vasilisa married Mikhail Vasilevich of Kashin, a Tverite prince opposing Lithuania. Her brother Jaunutis sought her help when he was deposed by Algirdas in 1345. Immediately before her death on 11 March 1345 Aigusta became a nun. She was buried within the Moscow Kremlin at a monastic church whose construction she had sponsored. It is possible that Gediminas had two more daughters. According to Maciej Stryjkowski, one of Gediminas' daughters was married to David of Hrodna, his favorite war leader. However, some historians