(Greek: demos, people; ergon, work)
Originally meaning any craftsman working for the public, was applied by Plato to the architect or maker of the material universe.
In the sense of a world-maker, distinct from the Supreme God, Demiurge became a common term in the various systems of Gnosticism.
According to Marcion, he was the personification of evil who caused the crucifixion of Christ.
Valentinus regarded him as the offspring of a union of matter with lower wisdom, a distant emanation from the Supreme God; other Gnostics identified him with Jehovah, God of the Jews and the Old Testament from whose power, Christ of the New Testament, Son of the Good God, rescued us.
New Catholic Dictionary