Socinianism is a Nontrinitarian Christian belief system developed and co-founded during the Protestant Reformation by the Italian Renaissance humanists and theologians Lelio Sozzini and Fausto Sozzini
Fausto Sozzini (1539–1604), the theologian namesake of Socinianism
Arianism is a Christological doctrine that rejects the traditional notion of the Trinity, teaching that Jesus was created by God and is therefore distinct from God. It is named after its proponent Ari
Socinianism
…movement of the 1540s, such as the anti-trinitarian Council of Venice in 1550. Lelio Sozzini was the first of the Italian anti-trinitarians to go beyond Arian beliefs in print and deny the pre-existence of Christ in his Brevis explicatio in primum Johannis caput – a commentary on the meaning of the Logos in John…
An imagined portrait of Arius. Detail of a Cretan School icon, c. 1591, depicting the First Council of Nicaea
Constantine burning Arian books, illustration from a compendium of canon law, c. 825
Once the orthodox Trinitarians succeeded in defeating Arianism, they censored any signs that the perceived heresy left behind. This mosaic in the Basilica of Sant'Apollinare Nuovo in Ravenna has had images of the Arian king, Theoderic, and his court removed. On some columns their hands remain.
The ceiling mosaic of the Arian Baptistery, built in Ravenna by the Ostrogothic King Theodoric the Great