An archon, in the Gnosticism of late antiquity, was any of several servants of the Demiurge, the "creator god" that stood between the human race and a transcendent God that could only be reached through gnosis. In this context they have the role of the angels and demons of the Old Testament. They give their name to the sect called Archontics. They were thus called from the Greek word ἄρχοντες, "principalities", or "rulers", by reason that they held the world to have been created and ruled by malevolent Archons. The term was taken from the ancient Greek position of office "archon".
A characteristic feature of the Gnostic concept of the universe is the role played in almost all Gnostic systems by the seven world-creating archons, known as the Hebdomad (ἑβδομάς). These Seven are in most systems semi-hostile powers, and are reckoned as the last and lowest emanations of the Godhead; below them—and frequently considered as derived from them—comes the world of the actually devilish powers. There are indeed certain exceptions; Basilides taught the existence of a "great archon" called Abraxas who presided over 365 archons (Irenaeus, Adversus Haereses, i. 24).
The ancient astronomy taught that above the seven planetary spheres was an eighth, the sphere of the fixed stars. In the eighth sphere, these Gnostics taught, dwelt the mother to whom all these archons owed their origin, Sophia (Wisdom) or Barbelo. In the language of these sects the word Hebdomad not only denotes the seven archons, but is also a name of place, denoting the heavenly regions over which the seven archons presided; while Ogdoad denotes the supercelestial regions which lay above their control.
The Ophites accepted the existence of these seven archons (Origen, Contra Celsum, vi. 31; a nearly identical list is given in On the Origin of the World):