Printing with Engraved Patterns

Byzantine medical art was grounded in the Greco-Roman medicine transmitted by Hippocrates and Galen and new concepts introduced by such physicians as Oribasios of Pergamon, Aetius of Amida, Alexander of Tralles and Paul of Aegina. 

Knowledge of plants and the practice of healing are closely entwined. The toxic or hallucinogenic nature of some roots, and the dangers associated with picking them, conferred a mythical or magical character and power. 

The shrines that created the glory of Constantinople through their lavish beauty were also repositories of precious relics and thus sources of healing.