"Since the 16th century, Basel has been home to a mysterious papyrus. With mirror writing on both sides, it has puzzled generations of researchers. A research team from the University of Basel has now discovered that it is an unknown medical document from late antiquity. The text was likely written by the famous Roman physician Galen." Source: University of Basel.
Note: "Galen, of Pergamum (AD 129 - ?199/216) in a spectacular career rose from gladiator physician in Asia minor to court physician in the Rome of Marcus Aurelius." Source: Oxford Classical Dictionary (OCD, 3rd ed. revised).
Galen was a major figure in the development of medicine in particular and science in general. "Arguably the most accomplished of all medical researchers of antiquity, Galen influenced the development of various scientific disciplines, including anatomy, physiology, pathology, pharmacology, and neurology, as well as philosophy and logic." (Wikipedia) According to the OCD, "his major enterprise to create a logic of scientific demonstration, surviving only in fragments, went beyond Artistotle and the Stoics in both the range and precision of its arguments."