I beg your pardon, but most Christians DO believe Rome is the True Church.
No they don't. Rome doesn't have the marks of the Body of Christ.
"MARKS OF THE NEW TESTAMENT CHURCH"
1.Its Head and Founder--CHRIST. He is the law-giver; the Church is only the executive.
(Matt. 16:18; Col. 1:18)
2.Its only rule of faith and practice--THE BIBLE. (II Tim. 3:15-17)
3.Its name--"CHURCH," "CHURCHES." (Matt. 16:18; Rev. 22:16)
4.Its polity--CONGREGATIONAL--all members equal. (Matt. 20:24-28; Matt. 23:5-12)
5.Its members--only saved people. (Eph. 2:21; I Peter 2:5)
6.Its ordinances--BELIEVERS' BAPTISM, FOLLOWED BY THE LORD'S SUPPER.
(Matt. 28:19-20)
7.Its officers--PASTORS AND DEACONS. (I Tim. 3:1-16)
8.Its work--getting folks saved, baptizing them (with a baptism that meets all the requirements
of God's Word), teaching them ("to observe all things whatsoever I have commanded you").
(Matt. 28:16-20)
9.Its financial plan--"Even so (TITHES and OFFERINGS) hath the Lord ordained that they
which preach the gospel should live of the gospel," (I Cor. 9:14)
10.Its weapons of warfare--spiritual, not carnal. (II Cor. 10:4; Eph. 6:10-20)
11.Its independence--separation of Church and State. (Matt. 22:21)
In any town there are many different churches -- all claiming to be the true church. -- Take the marks, or teachings, of the different churches and find the ones which have these marks, or doctrines. The ones which have these marks, or doctrines, taught in God's Word, are the true churches.