Brill Encyclopedia of Early Christianity Online

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In the arithmetically informed speculations of Christian and Hermetic theologians of the early centuries CE, the eighth “sphere” or region (ὀγδοάς, “ogdoad”), as well as groups of eight celestial places or entities (“ogdoads”) enjoyed great attention. This popularity of ogdoadic speculation in the first centuries CE is interesting, because the number eight does not ap…

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Burns, Dylan M., “Ogdoas”, in: Brill Encyclopedia of Early Christianity Online, General Editor David G. Hunter, Paul J.J. van Geest, Bert Jan Lietaert Peerbolte. Consulted online on 28 September 2023 <>
First published online: 2018

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