Key word 'visible'. There is no such thing. Every man comes before God on his own, absolutely no human will be able to intercede on anyone's behalf. Therefore, one's church, one's congregation, one's open confessions or crucifix around their neck, will never reveal their standing with God. Churches do not save, no matter the antiquity, size, popularity nor wealth. Christ established his Church on earth, via the Apostles, but there is absolutely no one but God the Father, who knows exactly who's name is written in the Book of Life, or not. There is no authentic visible Christian Church on earth, it is invisible and diversified.