The study deals with the life and work of dr. József Czakó, chief of medicine, sanatorium director, university professor, about whom very little summary has been written so far. He tries to bring important historical medical data out of obscurity and save them for posterity, which are related to the establishment of the Marosvásárhely Sanatorium and the first heart surgery performed in Transylvania, by organizing the New Hospital, as well as the Hungarian-language medical training that started in 1944 at Marosvásárhely. By using specialized literary sources and unique documents, as well as based on the author's own experiences, relying on the Czakó legacy, he saves the important data, which reveals new information and important details about the health conditions of the small town at the beginning of the last century.