That... didn't happen. Sorry. The first part did, though it was mostly the mythology that got incorporated, and there was a whole controversy about the date of Easter, but nothing much more interesting than that. One really cool thing is that Ireland was one of the only parts of Europe in the Dark Ages that didn't forget the world was round. Because Ireland wasn't part of the Roman Empire, it wasn't as affected by its fall, so it stayed all learny and awesome while everyone else was sleeping in poo and eating their family members.
OK, so my grasp on things isn't that great, but I'm pretty sure the general gist of that is right xD
Easter.... where'd that name come from again? And how come Christmas is a lot closer to the Winter
solstice than Springtime (when shepherds might have been in the hills watching over their flocks by night)
...oh, and St. Brigid (or Brigit or whichever).... Anybody celebrate May Day? (No, with a may pole, not by protesting unfair labour practises...)
There's plenty of material out there, but most of it is written by non-academics for a partisan audience.
This subject needs careful examination by someone like yourself - biased, perhaps, but open-minded and
posessed of a working brain.
Anyway, if you don't wanna go there, you could start at the other end of the mule and examine how
secular aspects of the Roman Empire
have become central parts of the Roman Church