The Testamentum

The Testamentum was assembled and transcribed by Marcion of Sinope around 128 C.E. It stands as the first codified Christian Biblical canon, nearly 300 years before the compilation of the standard Biblical canon adopted by most mainline Christian denominations today.

Unlike later Bibles shaped by the emerging Catholic tradition, the Testamentum was not divided into "Old" and "New" testaments. It was dramatically shorter, purer in focus, and uncompromising in its theological coherence. Its brevity reflected its precision. It contained only those writings proclaiming the Good News of the previously unknown God revealed through Jesus Christ.

The Marcionite Christians held that the Hebrew Bible-and the god portrayed within it-was incompatible with the gospel of Jesus and Paul. The wrathful, tribal deity of the Hebrew Scriptures, Yahweh, stood in opposition to the loving Father revealed by Christ. The two could not be reconciled. Marcion rejected the Hebrew Bible entirely, asserting that its inclusion in the Christian canon only produced confusion and distortion.

Marcion taught that Jesus did not come to fulfill the Hebrew law but to abolish it. He believed that Jesus came not from Yahweh, but from the true God, one unknown to the prophets and patriarchs. This theological rupture defined the Marcionite worldview and shaped the contours of their canon.

The Testamentum was divided into distinct but unified sections. The first was the Evangelicon, or Gospel of the Lord Jesus Christ, received through Paul. It presents a pristine account of Christ's teachings, free from the Judaizing interpolations of the later Gospels. Next came the Apostolicon, a collection of ten Pauline Epistles: Galatians, 1 Corinthians, 2 Corinthians, Romans, 1 Thessalonians, 2 Thessalonians, Laodiceans (Ephesians), Colossians, Philemon, and Philippians.

The Antilegicon included four disputed Pauline letters: Titus, 1 Timothy, 2 Timothy, and Alexandrians (Hebrews) . Though treated with caution due to questionable authorship, they were preserved for study and pastoral use, always secondary to the Apostolicon.

To enrich spiritual life and worship, the Marcionite tradition preserved additional writings. The Psalmicon contained forty psalms, making it the earliest known Christian hymnbook. These psalms offered poetic theology centered on the grace of the true God and the redemptive mission of His Son.

The Homileticon featured Marcion's Homily to Diognetus, one of the earliest surviving Christian apologetic works. It reflects Marcion's theological clarity and pastoral zeal. In this work, Marcion defends the distinction between the Father of Jesus Christ and the god of the Hebrews with philosophical depth and rhetorical elegance.

Finally, the Synaxicon compiled seven pastoral letters written by Marcion: Ephesians, Magnesians, Trallians, Romans, Philadelphians, Smyrneans, and the letter to Metrodorus. These epistles show the devotion, structure, and missionary focus of the Marcionite Church. They offer insight into the early Pauline congregations that remained faithful to the gospel of liberty, rejecting the legalism creeping into other communities. They also demonstrate the robust ecclesial identity of the Marcionite movement, with its own bishops, liturgies, and spiritual disciplines.

Marcion's canon rejected the entire 46-book "Old Testament" as well as the gospels, acts, and letters that would later form the 27-book "New Testament." These later texts were seen as reactions to his radical purity-a reassertion of Jewish influence over the faith. The Testamentum remains the earliest and most coherent expression of the gospel as proclaimed by Paul: a Christianity unburdened by law, liberated by grace, and devoted to the one true God.