Ludwig Eduard Boltzmann
(Wien, 20 February 1844 - Duino, Trieste, 5 September 1906)
has been one of the most important theoretical physicists of all ages. His fame is due to his researches in thermodynamics and statistical mechanics (the fundamental equation of kinetic theory of gasses and the second law of Thermodynamics). He contributed also to mechanics, electromagnetism, mathematics and philosophy. His innovative ideas (on atomism, irreversibility, etc.) raised many discussions and were often misinterpreted and refused.
(text and image from Wikipedia the open encyclopaedia).