LOL..oy vey... this canard again. Uncle Chip, I dunno where you got this "fact", but it is pure and simple BS, and it harms rather than helps your case.
Show me one, ONE primary source document from the 4th century that supports this claim. Or 5th century. Or 6th century. Where can I find this reported Eusebius? Sozemen? Take your pick of Late Roman historians, and find me one that says anything like this at all.
This nonsense about Constantine and paganization of the Church is *made up*. It never happened. Ask any serious historian of the period.
Show me where the title "Pontiff" or even "Pope" was ever used by a Bishop of Rome before Constantine????