Liber Juratus Honorii (The Sworn Book of Honorius)

Documented history: The Liber Juratus Honorii, commonly rendered in English as The Sworn Book of Honorius, is identified in modern reference sources as a medieval Latin grimoire attributed to an authoritative-sounding figure called Honorius of Thebes; the Latin epithet juratus is glossed as 'sworn' or 'oathbound' in these accounts (Source 1). Reference databases classify it explicitly as a medieval grimoire (Source 2). Surviving material associated with the work includes manuscript leaves in at least one late medieval English manuscript context: Penn Libraries’ LJS 226 contains three leaves dated to the early 15th century that the catalog describes as 'possibly from the Liber juratus Honorii' and that preserve magical diagrams such as a horoscope template, a circular zodiac calendar, and Cabala-related diagrams (Source 5). The Liber Juratus is listed in modern indexes of angel names and magical words alongside canonical grimoires (e.g., Heptameron, Abramelin, Key of Solomon, Picatrix), indicating its recognition in modern occult bibliographies (Source 3). Modern scholarship and occult studies treating angelology and talismanic traditions cite the Liber Juratus among foundational texts that preserve or transmit angelic names, angelologies, and talismanic/theurgical instructions (Source 4). These combined attestations show the text occupies a recognized place in the corpus of medieval ceremonial magic and angelology. Legends and attribution: The work’s ascription to 'Honorius of Thebes' appears in its traditional titulature; this is a pseudepigraphic attribution typical of medieval magical works seeking authoritative provenance. Some traditional ascriptions also describe Honorius as 'son of Euclid' (reported in reference summaries), but the provided sources treat such details as part of the text’s legendary ascription rather than established historical fact (Source 1). The supplied materials do not establish a firm date or precise place of original composition; while manuscript evidence shows circulation in late medieval England, composition may be earlier and is not fixed by the cited sources (Sources 1, 5). Contents and practical material: The supplied sources collectively indicate the Liber Juratus preserves material characteristic of medieval operational/theurgical grimoires: angelic names and angelologies, talismanic and theurgical procedures, and diagrammatic astrological and cabalistic material. A study tracing the angelic entity Abrinael cites the Liber Juratus among foundational texts used to reconstruct angelic figures and related talismanic/theurgical instruction (Source 4). The manuscript leaves cataloged at Penn (LJS 226) contain concrete diagrammatic material—a horoscope template, a circular zodiac calendar, and Cabala-related diagrams—supporting the presence of astrological and cabalistic diagrams in manuscripts associated with the Liber or its milieu (Source 5). A modern Turkish-language index of angel names and magical words lists 'Liber Juratus (Honorius’un Yeminli Kitabı)' among standard grimoire titles, reflecting its treatment in occult bibliographies as a source of angelic/divine names and magical words (Source 3). Curse history and dangers: The provided sources do not supply any explicit traditions of curses, specific personal dangers, or concrete supernatural effects tied to owning or reading the Liber Juratus. No direct warnings or first-hand reports of phenomena attributable to the book are quoted in the cited material (Sources 1–5).