“The New Testament was not decided upon until the late 4th century, at the Council of Rome, in the year 382. This collection of writings from the first century Christians was determined by this Council to be divinely inspired by God, the real author.”
What you are actually referring to is the alleged Decree of Gelasius, often ascribed to earlier popes as well, and to the council of Rome. It is a fake:
“The Decree of Gelasius (Decretum Gelasianum), which contains a list of canonical books, was so called because it was formerly ascribed to Pope Gelasius (in office from 492 to 496). Various recensions of the same decree were also ascribed to the earlier Pope Demasus (366-384) and the later Hormisdas (514-523), or to councils over which they presided. But for the past century most scholars have agreed with Ernst von Dobschütz’s conclusion that all the various forms of the decree derive from the independent work of an anonymous Italian churchman in the sixth century.”
http://www.bible-researcher.com/gelasius.html
Not to mention this “fake” was heavily used by the Rome hated Dan Brown.
Fake? On the mind of some protestants.
http://thecatholicvoyager.blogspot.com/2012/09/the-canon-of-scripture-damasus-and.html