[quote="Filii_Dei, post:3, topic:271310"]
Both Catholicism and Orthodoxy are the oldest, since both were part of the original One, Holy, Catholic, Apostolic Church which Christ founded, and both continue to nurture the traditions that were given to them by the Apostolic Fathers.
Of course, this presumes that both are the Church of Christ, and I'm sure some people in both camps might disagree with that, but that argument is for another day, another thread. :)
Protestantism, however, began only five hundred years ago. As much as they may claim to be the true Christian Church, they are a relatively new movement.
The tragic schism solidified in 1204 (I believe . . . 1054 was, for the most part, a non-event) AD sundered in two the ancient Church.
As such, both can be seen as apostolic in origin and identity, but one can be called more correct than the other. This is neither the time nor place for that debate, which has been waged in some form now for centuries.
It would be wise not to lump all Protestants together. Since there is among them little cohesion of culture, identity, or doctrine, each group must be dealt with individually, as each, if you will, speaks a different language, much like Catholic and Orthodox Christians have different languages from each other. Language meaning mode and terms of theological expression.