Ignác Semmelweis (1818-1865), popularly known as “the saviour of mothers”. He began his career in Vienna; it was there that he discovered the cause of puerperal fever. He left Vienna for the Medical Faculty of the Imperial and Royal University of Pest (now Semmelweis University), where he served as professor and director of the Department of Obstetrics and Gynaecology from 1855 to 1865.