Where do you get this nonsense. If you say we have a 300-year gap, then to be consistent you must say there is no such thing as history prior to 300 A.D. Just goes to show that your doctines must rely on ignorance. Nah. That is begging the question big time. The history of the early AD exists.. it just, for some reason, is completely silent about Catholicism for some reason. You see, the world doesn't revolve around Catholicism anymore than the sun revolves around the earth..
Actually... that's not true. There is very little direct history of the first three centuries of any type (and that which we do have barely even mentions Christ... let alone a church). We hardly even have any Scripture manuscript from prior to 300 A.D. Virtually all church history for those first three centuries comes from the letters of the early church fathers (appearently much disputed here).
Some of the only manuscripts from that period (like the Dead Sea scrolls) are even claimed to dispute some of accepted Scripture (I'll believe it when I see it and maybe not then).
By the way, has anyone ever tried typing with an 18month-old sitting in your lap competing for the keyboard???