Work dossier · summary and historical context
This work is a calendrical diagram from the Ethiopic (Geʿez) tradition, designed to compute movable feasts. It survives in a single manuscript witness (betmas) with no colophon or scribal note, leaving its transmission chain unknown. The diagram is undated, but paleographic comparison suggests a 17th–18th century origin, though this remains tentative. The edition provides a transcription and English translation but lacks commentary on the diagram’s computational rules, requiring external computus manuals for full interpretation. The diagram’s structure aligns with known Ethiopic computus manuscripts, and its headings include transliterated Coptic terms for the lunar cycle, likely referencing the 19-year Metonic cycle used in Alexandrian-derived computus.
This diagram is a rare witness to Ethiopic calendrical computation, illustrating how Alexandrian computus was adapted in the Geʿez tradition. It provides insight into the practical methods for determining movable feasts, especially Easter, in Ethiopian Christianity. Its relation to other Ethiopic computus manuscripts underscores the continuity of this tradition, while its Coptic terminology highlights cross-cultural exchange between Egyptian and Ethiopian Christian communities.
The diagram belongs to the Ethiopic Christian tradition, which developed a distinctive computus for calculating liturgical dates, especially Easter, based on Alexandrian methods. The Geʿez tradition, centered in the Ethiopian Orthodox Tewahedo Church, adapted these methods from Coptic sources, often using 19-year Metonic cycles and epact calculations. The work survives in a single manuscript (betmas) of uncertain provenance, with no colophon or scribal note, so its exact date and place of composition are unknown. Paleographic analysis tentatively places it in the 17th–18th centuries, a period when Ethiopic computus manuscripts were produced in monastic scriptoria. The diagram’s use of Coptic terms (e.g., 'ʿĀw Daf, Qama Rafʿ') reflects the transmission of Alexandrian calendrical science into Ethiopic tradition. Its survival in a single witness suggests limited circulation, possibly within a specific monastic community. The lack of commentary in the edition means the diagram’s computational rules must be reconstructed from other Ethiopic computus manuals.
Apparatus · what the pipeline recorded
| Coptic | Rendering | Count | First |
|---|---|---|---|
| no glossary terms recorded | |||