“Actually Constantine the Great founded what is today the Catholic Church around 325 A.D., or so. Constantine was very pagan oriented too.”
Didn’t he establish the Catholic church as the religion of the Empire?
Constantine officially tolerated Christianity through the Edict of Milan in AD 313. In fact, he was not baptized until shortly before his death in AD 337.
Interestingly, one of his successors, Julian, re-asserted paganism as the state religion a few decades later. The Catholic Church did not actually become the state religion of Rome until 380, under Theodosius I.