Theodosius’ sister Pulcheria, a devout Christian, maintained a court with an austere atmosphere. Under her influence Theodosius and his wife Aelia Eudoxia became devout Christians. While seemingly indifferent to [[Arianism]] practiced by the German tribes, Pulcheria stood firm against the heretical teachings of [[Nestorius]]. Whenever Theodosius wavered toward supporting Nestorius, who was the Patriarch of Constantinople, Pulcheria, who supported [[Cyril of Alexandria]], would assert her influence over her brother steering him away from Nestorianism. The controversies eventually led to the [[Second Ecumenical Council|Council of Ephesus]] in 431.
In 441, Theodosius, under the influence of the eunuch Chrysaphius, was convinced to dismiss his sister. Theodosius then began to support the [[Monophysitism|Monophysite]] [[heresy]] that was promoted by the [[archimandrite]] Eutyches and Dioscorus. Dioscorus was the patriarch of Alexandria and successor to Cyril. Eutyches’ views were validated by the 'Robber Council' of 449. On [[July 28]], 450, Theodosius died when he was thrown from his horse while crossing the River Lycus, severely injuring his spine. The new emperor Marcian returned, with Pulcheria as his wife, and convened the [[Third Ecumenical Council|Council of Chalcedon]] in 351 which found Monophysitism to be heretical.
title=Eastern Roman (Byzantine) Emperor|