Theotokos (Θεοτόκος) lit. "one who bears the One who is God"; a common title in Eastern Christianity with Christological implications; adopted officially during Council of Ephesus (431) in response to Nestorianism, which questioned the Church's teaching that Jesus Christ's nature was unified.
This Theotokos page is adapted from one by David Cassens, director of the Pius XII Library at St. Louis University, whose Eastern Orthodoxy LibGuide is used as a template here, as it has been for LibGuides at other institutions. Our thanks to David for his permission to use his inspiring work.