A recent discussion about authority

De Maria, 
The problem with your statement is that ROME had no authority over Christendom. 

On the contrary, Glenn, Jesus Christ established the Catholic Church and empowered her to:

Matthew 28:18 And Jesus came and spake unto them, saying, All power is given unto me in heaven and in earth.  19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:  20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.

The Roman bishop originated as equal in authority to all other bishops (Constantinople, Jerusalem, Antioch, et al). The Roman bishop apostatized and declared himself as authority over all the Church as he brought in all the heresy still taught by Rome today.

On the contrary, Jesus Christ appointed St. Peter as the head of His Church.  It is clearly stated in Scripture.

John 21:17 King James Version (KJV)

17 He saith unto him the third time, Simon, son of Jonas, lovest thou me? Peter was grieved because he said unto him the third time, Lovest thou me? And he said unto him, Lord, thou knowest all things; thou knowest that I love thee. Jesus saith unto him, Feed my sheep.

And when the Protestants rebelled against the Catholic Church, they rebelled against Christ.  And today, when they reject the Eucharist, they make themselves the enemies of God.

Hebrews 10:25 Not forsaking the assembling of ourselves together, as the manner of some is; but exhorting one another: and so much the more, as ye see the day approaching.  26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,  27 But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.  28 He that despised Moses' law died without mercy under two or three witnesses:  29 Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?  30 For we know him that hath said, Vengeance belongeth unto me, I will recompense, saith the Lord. And again, The Lord shall judge his people.  31 It is a fearful thing to fall into the hands of the living God.

Hello De Maria,
Your argument does not hold water when Roman Catholicism is viewed from the perspective of it being a gradual historical development (and rightly so, I add). Your church has in fact contradicted the written Word of God.

That perspective is wrong.  Jesus Christ established the Catholic Church when He said:

Matthew 16:18 And I say also unto thee, That thou art Peter, and upon this rock I will build my church; and the gates of hell shall not prevail against it.  19 And I will give unto thee the keys of the kingdom of heaven: and whatsoever thou shalt bind on earth shall be bound in heaven: and whatsoever thou shalt loose on earth shall be loosed in heaven.

While Scripture does indeed condemn acts of rebellion (1 Samuel 15:23), it is not rebellion to stand up against ungodly and unlawful governments. An unjust authority is no authority at all.

But Jesus Christ condemns any who disobey His Church:

Matthew 18:17 And if he shall neglect to hear them, tell it unto the church: but if he neglect to hear the church, let him be unto thee as an heathen man and a publican.

Using your logic, the American Revolutionary War never should have happened. Using your logic, it would have been wrong for the apostles to speak against the Jewish Sanhedrin when it told them to stop preaching Christ in Acts 5. 

On the contrary, the King of England was not God.  While it is God who died upon the Cross to bring an end to Judaism and establish the New Testament Church.

The authority claims of the Roman Catholic Church are self-proclaimed and unbiblical.

Wrong.  The Catholic Church was established by Jesus Christ and all who rebel against her, rebel against the Lord of Heaven and earth who established her and continues to speak through her to this day:

Luke 10:16 He that heareth you heareth me; and he that despiseth you despiseth me; and he that despiseth me despiseth him that sent me.