 The "Primary Chronicle" posits Olga of Kiev (died 969) as the first Christian in Rus'.However, the Rus'-Byzantine Treaty (945), concluded during the reign of Olga's predecessor Igor and extensively quoted in the "Primary Chronicle", mentions that some of the Rus' envoys who signed the treaty were Christians.Furthermore, the chronicle admits that the collegiate church of Saint Elijah existed in Kiev as early as 944, "for many Varangians and Khazars were Christians".