Of the 14 letters - Romans to Hebrews inclusive -** traditionally** ascribed to Saint Paul
Infallibly.
the Church has not taught Pauline authorship as a dogma.
“A brief addition shows what books really are received in the canon. These are the desiderata of which you wished to be informed verbally: of Moses five books, that is, of Genesis, of Exodus, of Leviticus, of Numbers, of Deuteronomy, and Josue, of Judges one book, of Kings four books, also Ruth, of the Prophets sixteen books, of Solomon five books, the Psalms. Likewise of the histories, Job one book, of Tobias one book, Esther one, Judith one, of the Machabees two, of Esdras two, Paralipomenon two books. Likewise of the New Testament:** of the Gospels four books, of Paul the Apostle fourteen epistles, **of John three, epistles of Peter two, an epistle of Jude, an epistle of James, the Acts of the Apostles, the Apocalypse of John.” **Pope Innocent (regn. A.D. 401-417), Epistle to Exsuperius Bishop of Toulose, 6:7,13 (A.D. 405). **
“Besides the canonical Scriptures, nothing shall be read, in the church under the title of divine writings.’. The canonical books are:—Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Joshua, Judges, Ruth, the four books of Kings, the two books of Paraleipomena (Chronicles), Job, the Psalms of David, the five books of Solomon, the twelve books of the (Minor) Prophets, Isaiah, Jeremiah, Daniel, Ezekiel, Tobias, Judith, Esther, two books of Esdras, two books of the Maccabees. The books of the New Testament are:—the four Gospels, the Acts of the Apostles, **thirteen Epistles of S. Paul, one Epistle of S. Paul to the Hebrews, **two Epistles of S. Peter, three Epistles of S. John, the Epistle of S. James, the Epistle of S. Jude, the Revelation of S. John. Concerning the confirmation of this canon, the transmarine Church shall be consulted.” **Council of Hippo, Canon 36 (A.D. 393). **
“[It has been decided] that nothing except the Canonical Scriptures should be read in the church under the name of the Divine Scriptures. But the Canonical Scriptures are: Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Josue, Judges, Ruth, four books of Kings, Paralipomenon two books, Job, the Psalter of David, five books of Solomon, twelve books of the Prophets, Isaias, Jeremias, Daniel, Ezechiel, Tobias, Judith, Esther, two books of Esdras, two books of the Maccabees. Moreover, of the New Testament: Four books of the Gospels, the Acts of the Apostles one book, thirteen epistles of Paul the Apostle, one of the same to the Hebrews, two of Peter, three of John, one of James, one of Jude, the Apocalypse of John.” **Council of Carthage III, Canon 47 (A.D. 397). **
The remainder are the books which are strictly called the Prophets: twelve separate books of the prophets which are connected with one another, and having never been disjoined, are reckoned as one book; the names of these prophets are as follows:–Hosea, Joel, Amos, Obadiah, Jonah, Micah, Nahum, Habakkuk Zephaniah, Haggai, Zechariah, Malachi; then there are the four greater prophets, Isaiah, Jeremiah, Daniel, Ezekiel. The authority of the Old Testament is contained within the limits of these forty-four books. That of the New Testament, again, is contained within the following:–Four books of the Gospel, according to Matthew, according to Mark, according to Luke, according to John;
fourteen epistles of the Apostle Paul–one to the Romans, two to the Corinthians, one to the Galatians, to the Ephesians, to the Philippians, two to the Thessalonians, one to the Colossians, two to Timothy, one to Titus, to Philemon, to the Hebrews: two of Peter; three of John; one of Jude; and one of James; one book of the Acts of the Apostles; and one of the Revelation of John." **Augustine, On Christian Doctrine, 2:8,12 (A.D. 426). **
Praise be Jesus Christ.