Gilbert Foliot II. It opened on 4 April 1139, and among other matters heard an appeal from the Empress Matilda concerning her claim to the throne of England. Matilda was the daughter and only surviving legitimate child of King Henry I, but following her father's death in late 1135 her cousin Stephen, the son of Henry's sister, had seized the crown. By 1139 Matilda had gathered supporters and was contesting Stephen's right to the throne. In about 1143 Foliot wrote an account of the proceedings of the council in a letter to one of Matilda's supporters. No action was taken on her
Henry II, Holy Roman Emperor Yaroslav, the pretender to the throne of the Kievan Rus'. A son of Kievan Grand Duke Vladimir the Great, he was vice-regent of the Principality of Novgorod at the time of his father's death in 1015. Yaroslav's eldest surviving brother, Sviatopolk I of Kiev, killed three of his other brothers and seized power in Kiev. Henry II's support of Yaroslav was in direct opposition to not only Sviatopolk but to Bolesław I as well. Years before, Bolesław I had married one of his daughters to Sviatopolk, making the new Kievan Grand Duke a son-in-law to the Polish Duke. Henry II