The nature of Christ's Church as found in the Bible is one, universal, visible, historical, concrete/locatable/identifiable, hierarchical, sacramental, infallible Church; and as the Creeds state that visible Church is "One, Holy, Catholic, and Apostolic";
That is the Church that passed into the 2nd, 3rd, 4th, 5th centuries, right up to the 16th century; she is the Church of the Fathers, Saints, Creeds and Councils;
Find the true men of God and you find the one true visible Church of God; the men of God are those in legitimate authority who cannot be usurped or replaced except by other high ecclesiastical authorities; nor can reformation, restoration, or change of the received doctrines of the Church be done except led by ranking ecclesiastical authorities (those same men of God); this eliminates Protestantism as the true heirs of the original historical apostolic Church since they broke away from the legitimate Church authority -- the Catholic Church of the 16th century -- where they took their mission. Catholicism is superior to Protestantism, thats all I need to prove, as we all agree that Catholicism was before Protestantism. Now if you wish to discuss Orthodox Christians and who was first, thats a different story.
Peace