A collection of Greek, Roman and Byzantine texts on medicine, written in Latin, that was mainly used as medical school textbook or reference manual between the 13th and 16th centuries. The Articella grew around a synthetic exposition of classical Greek medicine written in Baghdad by the Nestorian Christian Hunayn bin Ishaq (Johannitius), who frequently translated from Greek to Syriac to Arabic. His synthesis was based on Galen's Ars medica (Techne iatrike; Questions on medicine for students) and thus became known in Europe as Isagoge Ioannitii ad tegni Galieni. The collection includes works of Hippocrates, Galen,Theophilus Protospatharius, Johannitius, and the Byzantine physician Philaretus. As a medical library in one convenient volume, which underwent six editions in the 15th century and many other editions in the first half of the 16th century, the work reflects changing attitudes to various ancient texts and translations through the evolution of its contents.  ISTC no. ia01142500. Digital facsimile from the Bayerische Staatsbibliothek at this link.

A Byzantine anatomical and physiological treatise almost entirely abridged from Galen's "De usu partium corporis humani," from which Theophilus now and then differed, and which he sometimes appears to have misunderstood. "In the fifth book he has inserted large extracts from Hippocrates' 'De Genitura,' and 'De Natura Pueri."'He recommends in several places the dissection of animals, but he does not appear ever to have examined a human body: in one passage he advises the student to dissect an ape, or else a bear, or, if neither of these animals can be procured, to take whatever he can get, 'but by all means,' he adds, 'let him dissect something' " (Wikipedia article on Theophilus Protospatharius). This is apparently the only surviving medical treatise by Theophilus. Digital facsimile from Google Books at this link.

Extensively annotated critical texts of Theophilus Protospatharius, Leo the Physician, Constantinus Pogonatos (De cibis; On foods). Digital facsimile from Google Books at this link.

Extensively annotated Greek & Latin edition of this Byzantine treatise on anatomy and physiology, edited by William Alexander Greenhill. Digital facsimile from the Internet Archive at this link.