I found it folded neatly in the back of volume one of Philip Hughes’ A History of the Church: An Introductory Study. I picked it up for $2.00 at the public library’s used book sale earlier this year.
Here on one piece of paper is all that was happening between the time Sts. Peter and Paul were martyred, up until the Edict of Milan. Sorry it’s a little cock-eyed, but this is the best I could do.
If you need me in the next couple of hours, you know where I’ll be.
Looky here! Time Charts A, B, & C