Context: Constantine the Great, who along with Licinius had decreed toleration of Christianity in the Roman Empire by what is commonly called the "Edict of Milan", and was the first Roman Emperor baptized, set precedents for later policy. By Roman law the Emperor was Pontifex Maximus, the high priest of the College of Pontiffs (Collegium Pontificum) of all recognized religions in ancient Rome. To put an end to the doctrinal debate initiated by Arius, Constantine called the first of what would afterwards be called the ecumenical councils and then enforced orthodoxy by Imperial authority.

Question: Who was the first Roman Emporor that was baptized?
Answer: Constantine the Great

Question: What did Constantine the Great and Licinius pass to introduce toleration of Christianity in the Roman Empire?
Answer: Edict of Milan

Question: What was the high priest in the College of Pontiffs called?
Answer: Pontifex Maximus

Question: What were the meetings called that were hosted by Constantine that helped enforce orthodoxy by Imperial authority?
Answer: the ecumenical councils

Question: Who was the first Roman babtized?
Answer: Unanswerable

Question: What was Licinius intolerant of?
Answer: Unanswerable

Question: What Edict established freedom of religion in Rome?
Answer: Unanswerable

Question: Who was high priest according to Christian tradition?
Answer: Unanswerable

Question: What council was first held by Arius?
Answer: Unanswerable