What Council Was This?

Council of Nicea

100

Which Ecumenical Council Was This? (Order)

1st Ecumenical Council

200

Which Emperor Called This Meeting?

Constantine

300

What was one thing that was failed to be enforced during this council?

Celibacy of priests

400

What is the Arianism Heresy that was discussed during this council?

The belief that the Son of God was not coeternal or consubstantial with the Father

500

What is Homoousios?

The description in the Creed as the Son of God being  of the same essence and being as the Father

Council of Ephesus

100

Who called this Council?

Roman Emperor Theodosius II

200

What Ecumenical Council was this? (Order)

Third Ecumenical Council

300

What Christian celebration's date was decided during this Council?

Easter

Council of Constantinople

100

What Ecumenical Council was this?

Second Ecumenical Council

200

What Creed was adopted at this council?

Nicene Creed

300

What is the Trinitarian Doctrine?

God is one God, but three coeternal consubstantial persons or hypostases—the Father, the Son, and the Holy Spirit—as "one God in three Divine persons".

400

Who called the Council?

Byzantine Emperor Theodosius I

500

What year was the Council held?

381 AD

Council of Chacledon

100

What number council was this?

4th

200

What is the Heresy of Monophysitism?

The belief that there is only one nature of Jesus (either divine or human), not both.

300

Who called for the Council?

Emperor Marcian