Anselm of Canterbury vs Olga of Kiev

Anselm was appointed Archbishop of Canterbury by King William II Rufus. This appointment initiated a long conflict with the English monarchy over church independence and the investiture of bishops.

Anselm went into voluntary exile after King William II refused to recognize Pope Urban II's authority and demanded Anselm's submission. Anselm remained in Italy until William's death in 1100.

Anselm completed his theological work 'Cur Deus Homo' (Why God Became Man) during his exile. This treatise developed the satisfaction theory of atonement, arguing that Christ's death was necessary to satisfy God's justice.

Anselm went into exile again after King Henry I refused to give up the right to invest bishops. Anselm returned only after a compromise was reached in 1107, separating spiritual and temporal investiture.

Anselm and King Henry I reached a compromise at the Concordat of London. The king gave up the right to invest bishops with ring and staff, but retained the right to receive homage before consecration.

As regent, Olga avenged Igor's murder by deceiving and killing Drevlian ambassadors, then besieging and burning their capital, Iskorosten. She used birds carrying flaming materials to set the city ablaze, subjugating the tribe.

Olga implemented a system of fixed tribute amounts and designated collection points (pogosts) across Kievan Rus. This reform standardized taxation, reduced corruption, and prevented the arbitrary exactions that had led to Igor's death.

Olga traveled to Constantinople and was baptized into Christianity by Emperor Constantine VII and Patriarch Polyeuctus, taking the name Helena. She became the first ruler of Kievan Rus to convert to Christianity.