Tadeusz Tomaszewski, born in 1910, graduate of the Jan Kazimierz University, Lvov, doctor honoris causa of Marja Sklodowska-Curie University, Lublin, is an exceptional figure in the history of Polish psychology. His scientific accomplishments and organizational talents, multipled by the achievements of his students, had a decisive impact on the shape and prestige of Polish psychology among other scientific disciplines and determined the rank of Polish psychology in the international arena.