Emperor Theodosius made chrisitianty the official religion of Rome.

[fishbuff]

and start killing the pagans, burning down their temples and the Alexandria library. not to mention appointing christian leaders to persecute the non-believers and start the roman's torture of the pagans.

http://en.wikipedia.org/wiki/Theodosius_I

without Theodosius, Christianity would not have flourished to what we know of today.
[video=youtube;zGSL5K8jehQ]https://www.youtube.com/watch?v=zGSL5K8jehQ[/video]