This study presents and appreciates the life and encyclopedic work of Dr. Mátyus István, the first medical scholar and scientist of Marosszék, on the 285th anniversary of his birth. The study also presents his effort to edit books such as Diaetetica I-II., Ó és Új Diaetetica I-VI. in his native language, and acknowledges the important place these works hold in the medical history and science of the 18th century.
Keywords: history of medicine, Mátyus István