Clemens Heinrich Krauss (31 March 1893 – 16 May 1954) was an Austrian conductor and opera impresario, particularly associated with the music of Richard Strauss. Krauss was born in Vienna out of wedlock to Clementine Krauss, then a 15-year-old dancer in the Vienna Imperial Opera Ballet, later a leading actress and operetta singer, niece of the prominent nineteenth-century operatic soprano Gabrielle Krauss. His natural father, Chevalier Hector Baltazzi (1851-1916), came from a family of wealthy Phanariot bankers resident in Vienna. Baltazzi's older sister Helene was married to Baron Albin Vetsera and was the mother of Baroness Mary Vetsera, who was accordingly Clemens Krauss' first cousin.