Marcionites and Montanists had also worked in the field.
He himself claims to have brought more than a thousand Marcionites within the pale of the church, and to have destroyed many copies of the Diatessaron of Tatian, which were still in ecclesiastical use; and he also exerted himself to improve the diocese, which was at once large and poor, by building bridges and aqueducts, beautifying the town, and by similar works.
Marcionites, named by Clement of Alexandria Antitactae (revolters against the Demiurge) held the Old Testament economy to be throughout tainted by its source; but they are not accused of licentiousness.
The same thing is seen from the fact that the heresy of the Marcionites was already showing itself in this district, for (in Tixeront's words) " heresies, in the first centuries at feast, only spread in already constituted Christian communities."
We learn further that Anicetus as a mark of special honour allowed Polycarp to celebrate the Eucharist in the church, and that many Marcionites and Valentinians were converted by him during his stay in Rome.