Liber Juratus (The Sworn Book of Honorius)

Liber Juratus is one of the most important medieval Latin manuals of ritual magic, probably composed in the 13th or 14th century and attributed to Honorius of Thebes. Its historical importance lies in its elaborate synthesis of angelic invocation, visionary ascent, and protective rites, and readers will find complex procedures, prayers, and cosmological doctrine aimed at attaining divine knowledge.

Honorius of Thebes is a largely legendary or pseudonymous figure associated with medieval ritual magic and grimoire literature. Under this name, texts circulated that presented ceremonial operations, angelic invocations, and other forms of practical magic within a Christian framework.