2. Irenaeus.
source:
http://www.columbia.edu/cu/augustine/arch/irenaeus/advhaer3.txt
I actually studied him in one of my classes. He addressed the Gnostics. He basically said that we know the Church is right because of apostolic succession. We know the Gnostics are wrong, even though they use the Bible to support their teachings, cause they don't have Apostolic Succession.
Yes, he does use Rome as an example of one of the churches cause he can't talk about every single church. BUT... check out the part in red:
CHAP. III.--A REFUTATION OF THE HERETICS, FROM THE FACT THAT, IN THE
VARIOUS CHURCHES, A PERPETUAL SUCCESSION OF BISHOPS WAS KEPT UP.
1. It is within the power of all, therefore, in every Church, who
may wish to see the truth, to contemplate clearly the tradition of the
apostles manifested throughout the whole world; and we are in a
position to reckon up those who were by the apostles instituted
bishops in the Churches, and [to demonstrate] the succession of these
men to our own times; those who neither taught nor knew of anything
like what these [heretics] rave about. For if the apostles had known
hidden mysteries, which they were in the habit of imparting to "the
perfect" apart and privily from the rest, they would have delivered
them especially to those to whom they were also committing the
Churches themselves. For they were desirous that these men should be
very perfect and blameless in all things, whom also they were leaving
behind as their successors, delivering up their own place of
government to these men; which men, if they discharged their functions
honestly, would be a great boon [to the Church], but if they should
fall away, the direst calamity.
2. Since, however, it would be very tedious, in such a volume as
this, to reckon up the successions of all the Churches, we do put to
confusion all those who, in whatever manner, whether by an evil
self-pleasing, by vainglory, or by blindness and perverse opinion,
assemble in unauthorized meetings; [we do this, I say,] by indicating
that tradition derived from the apostles, of the very great, the very
ancient, and universally known Church founded and organized at Rome by
the two most glorious apostles, Peter and Paul; as also [by pointing
out] the faith preached to men, which comes down to our time by means
of the successions of the bishops.
For it is a matter of necessity
that every Church should agree with this Church, on account of its
pre- eminent authority,(3) that is, the faithful every- where,
inasmuch as the apostolical tradition has been preserved continuously
by those [faithful men] who exist everywhere.
3. The blessed apostles, then, having founded and built up the
Church,
committed into the hands of Linus the office of the
episcopate. Of this Linus, Paul makes mention in the Epistles to
Timothy. To him succeeded Anacletus; and after him, in the third place
from the apostles, Clement was allotted the bishopric. This man, as he
had seen the blessed apostles, and had been conversant with them,
might be said to have the preaching of the apostles still echoing [in
his ears], and their traditions before his eyes. Nor was he alone [in
this], for there were many still remaining who had received
instructions from the apostles.
In the time of this Clement, no small
dissension having occurred among the brethren at Corinth, the Church
in Rome despatched a most powerful letter to the Corinthians,
exhorting them to peace, renewing their faith, and declaring the
tradition which it had lately received from the apostles, proclaiming
the one God, omnipotent, the Maker of heaven and earth, the Creator of
man, who brought on the deluge, and called Abraham, who led the people
from the land of Egypt, spake with Moses, set forth the law, sent the
prophets, and who has prepared fire for the devil and his angels. From
this document, whosoever chooses to do so, may learn that He, the
Father of our Lord Jesus Christ, was preached by the Churches, and may
also understand the apostolical tradition of the Church, since this
Epistle is of older date than these men who are now propagating
falsehood, and who conjure into existence another god beyond the
Creator and the Maker of all existing things. To this Clement there
succeeded Evaristus. Alexander followed Evaristus; then, sixth from
the apostles, Sixtus was appointed; after him, Telephorus, who was
gloriously martyred; then Hyginus; after him, Pius; then after him,
Anicetus. Sorer having succeeded Anicetus, Eleutherius does now, in
the twelfth place from the apostles, hold the inheritance of the
episcopate. In this order, and by this succession, the ecclesiastical
tradition from the apostles, and the preaching of the truth, have come
down to us. And this is most abundant proof that there is one and the
same vivifying faith, which has been preserved in the Church from the
apostles until now, and handed down in truth.