Clemens Maria Hofbauer, Austrian priest, missionary, and saint (d. 1820)
Clement Mary Hofbauer (German: Klemens Maria Hofbauer) (26 December 1751 – 15 March 1820) was a Moravian hermit and later a priest of the Redemptorist congregation. He established the presence of his congregation, founded in Italy, north of the Alps, for which he is considered a co-founder of the congregation. He was greatly known for his lifelong dedication to the care of the poor during a tumultuous period of Europe's history, which left thousands in destitution. He worked to care for the Polish people, until he was expelled from there and moved to Austria.

Hofbauer has been declared a saint by the Catholic Church. Due to his extensive service in that city, he is called the Apostle of Vienna, of which he is a co-patron saint.