I want to know the answer to the following question:
What was the high priest in the College of Pontiffs called?
All the background I'm provided with is that "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.". Is that enough to answer the question?
Answer: no