Fourth Ecumenical Council (Chalcedon, 451)
The Fourth Ecumenical Council assembled in 451 at Chalcedon in order to retract the interpetation of the council of Ephesus (449) on the nature of Jesus Christe.

Notitia episcopatuum
The Notitiae episcopatuum are official documents of the Patriarchate of Constantinople and Antioch, containing the ecclesiastical dioceses in hierarchical order.These documents were modfied regularly.

Robber Council (Latrocinium) of Ephesus (449)
The Council of 449 in Ephesus, known as «Robber Council», had been convoked by Emperor Theodosios II as an Ecumenical one, but because of its problematic and controversial proceedings it was not recognized as such by the next Council. Under the presidency of Patriarch Dioscorus of Alexandreia, the Council absolved Archimandrite Eutyches, who had been excommunicated for his Monophysite beliefs. But the 449 Council was repudiated by the Fourth Ecumenical Council of Chalcedon (451), which marked the definite condemnation of Monophysicism.