Syrian-Egyptian Gnostic sects

thumb | right | alt=alt=Refer to caption | Seth. Patriarchs line in iconostasis. Zhdan Dementiev, Vologda. Cathedral of the Assumption, St. Cyril-Belozersky Monastery. Museum of Cyril Belozersky Monastery. The Sethians (Greek: Σηθιανοί) were one of the main currents of Gnosticism during the 2nd and 3rd century AD, along with Valentinianism and Basilideanism. According to John D. Turner, it originated in the 2nd century AD as a fusion of two distinct Hellenistic Judaic philosophies and was influenced by Christianity and Middle Platonism. However, the exact origin of Sethianism is not properly u

Valentinianism was one of the major Gnostic Christian movements. Founded by Valentinus ( CE – CE) in the 2nd century, its influence spread widely, not just within the Roman Empire but also from northwest Africa to Egypt through to Asia Minor and Syria in the east. Later in the movement's history, it broke into Eastern and Western schools. The Valentinian movement remained active until the 4th century, declining after Emperor Theodosius I issued the Edict of Thessalonica in 380, which established Nicene Christianity as the state religion of the Roman Empire.

The Basilidians or Basilideans were a Gnostic sect founded by Basilides of Alexandria in the 2nd century. Basilides claimed to have been taught his doctrines by Glaucus, a disciple of St. Peter, though others stated he was a disciple of the Simonian Menander.