So are you saying the office of overseer makes even protestant churches "catholic". The church as a whole which is what catholic means. Catholic is Protestant now. And Rome didn't and doesn't still believe in freedom of conscience.It doesn't matter. It is the institution of the office of a bishop (cf. 1st Timothy 3:1) that identifies the One Church of the Bible. That institution was established by the Apostles, who all acted with the authority of Christ. They instructed the first generation bishops like Timothy and Titus to cultivate the institution as well, and it has never ever stopped since then. All those bishops today are basically either Catholic or Orthodox. None of them are Calvinists or Nontrinitarians.