To solidify his control over the church, Theodosius appointed a distinguished theologian and future Saint, Gregory of Nazianzus (c.329-390), as bishop of Constantinople, and convened the Second ...

During his 12-year pontificate, Francis took important, even historical, ecumenical initiatives. In 2016, he became the first ...

The First Council of Constantinople was the second of seven ecumenical councils of the ... but the issue was not completely resolved. When Theodosius I assumed the Roman Imperial throne in 379 ...