St Augustine's Abbey

Esoteric Study

The Liber de Essentia Spirituum: Medieval Monks, Spirit Fellowship, and the Theurgy Hidden in a Canterbury Manuscript

Secret Magic Editorial Team August 14, 2026

Most medieval books of ritual magic survive because several generations of readers copied them. The Liber de essentia spirituum is different. Modern scholarship knows it…

The Liber de Essentia Spirituum: Medieval Monks, Spirit Fellowship, and the Theurgy Hidden in a Canterbury Manuscript

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