Task: Text Categorization
Input (English): The overall effect of this church council, which declared Jerusalem and Constantinople patriarchates, was to give the church a more stable institutional character. Convoked by the emperor Marcian and held in what is now Kadikoy, Turkey, this council acknowledged the orthodoxy of Theodoret, excommunicated the Monophysite Dioscorus, and approved the Tome of Pope Leo I confirming two distinct natures of Christ. FTP, name this Christian church council of 451 which approved the creed of Nicaea (ny-see-uh).
Output (English): History