Yūḥannā ibn Sabbā' (Author) Yūḥannā ibn Sabbā' (13-14th centuries) was the compiler of the Coptic theological encyclopedia The Precious Jewel on the Ecclesiastical Sciences(al-Jawharah al-nafīsah fī 'ulūm al-kanīsah).Abū al-Barakāt ibn Kabar (Author) Abū al-Barakāt ibn Kabar (d. 1324) was a Coptic priest and theologian and the author of The Lamp of Darkness and the Elucidation of the Service (Mișbâḥ al-ẓulmah wa-îḍāḥ al-khidmah).Gabriel V of Alexandria (Author) Pope Gabriel V of Alexandria (r. 1409-1427) was the 88th Pope of Alexandria and Patriarch of the See of St. Mark.Arsenius Mikhail (Edited & Translated By) Arsenius Mikhail is Professor of Liturgical Studies at St. Athanasius and St. Cyril Theological School in Los Angeles. He is the author of The Presentation of the Lamb: The Prothesis and Preparatory Rites of the Coptic Liturgy.