"The Christianity of history is not Protestantism. If ever there were a safe truth it is this, and Protestantism has ever felt it so; to be deep in history is to cease to be a Protestant." (-John Henry Newman, An Essay on the Development of Christian Doctrine).
"Where the bishop is, there let the people gather; just as where ever Jesus Christ is, there is the Catholic Church".-St. Ignatius of Antioch (ca 110 AD)a martyr later thrown to the lions, wrote to a church in Asia Minor. Antioch was also where the term "Christian" was first used.
“But if I should be delayed, you should know how to behave in the household of God, which is the church of the living God, the pillar and foundation of truth.” 1 Timothy 3:15
"This is the sole Church of Christ, which in the Creed we profess to be one, holy, catholic and apostolic." -CCC 811