"The identical thing that we now call the Christian religion existed among the ancients and has not been lacking from the beginnings of the human race until the coming of Christ in the flesh, from which moment on the true religion, which already existed, began to be called Christian." (Retract I. XIII,3).
See - https://en.wikipedia.org/wiki/Perennial_philosophy
Ergo: Pagans can, "go to heaven." This is an admission made relatively recently by the R.C. Church. "Woops - sorry!"