The Council of Constantinople of 553 (often called Constantinople II or the Fifth Ecumenical Council) has been described as 'by far the most problematic of all the councils', because it condemned two of the greatest biblical scholars and commentators of the patristic era Origen and Theodore of Mopsuestia and because the pope of the day, Vigilius, first condemned the council and then confirmed its decisions only under duress. The present edition makes accessible to the modern reader the acts of the council, session by session, and the most important related documents, particularly those that...