Originally published at: https://concordia.confident.faith/roman-confutation/article-i/
1 Especially when in the first article they confess the unity of the divine essence in three persons according to the decree of the Council of Nice, their Confession must be accepted, since it agrees in all respects with the rule of faith and the Roman Church. For the Council of Nice, convened under the Emperor Constantine the Great, has always been regarded inviolable, whereat three hundred and eighteen bishops eminent and venerable for holiness of life, martyrdom and learning, after investigating and diligently examining the Holy Scriptures, set forth this article which they here confess concerning the unity of the essence and the trinity of persons. So too their condemnation of all heresies arising contrary to this article must be accepted – viz. the Manichaeans, Arians, Eunomians, Valentinians, Samosatanes, for the Holy Catholic Church has condemned these of old.