The first Council of Constantinople.

The two councils are the council of Nicaea and the council of Constantinople.

It was written at the council of Nicaea (A.D. 325) and modified at the council of Constantinople (A.D. 381)

Biblical Canon was originally setup by the Catholic Church

Later there were changes to the books and their order by the Christian Councils:

the Council of Rome of 155

the Council of Rome of 193

the Council of Ephesus of 193

the Council of Carthage of 251

the Council of Iconium of 258[13]

the Council of Antioch of 264

the Council of Arabia of 246-247

the Council of Elvira of 306

the Council of Carthage of 311

the Synod of Neo-Caesarea of c. 314

the Council of Ancyra of 314

the Council of Arles of 314

First Council of Nicaea (325)

First Council of Constantinople (381)

First Council of Ephesus (431)

Council of Chalcedon (451)

Second Council of Constantinople (553)

Third Council of Constantinople (680-681)

Second Council of Nicaea (787)

Constantinople is located in Europe during the Eastern And Western Roman Empires