Alexander (16), of Tralles, physician, 525–605 ce, died in Rome. The author of an extant encyclopaedia of practical medicine, Alexander shows his continual adaptation of Graeco-Roman texts in light of his actual practice. He wrote the justly famous Letter on Intestinal Worms, a fundamental work in the history of early parasitology; excellent are his accounts of *ophthalmology, angina, pulmonary diseases, urology, gout, and *pharmacology, the last scattered throughout his writings.