- 1948 – Władysław Witwicki, Polish psychologist, philosopher, translator, historian (of philosophy and art) and artist (b. 1878).
Władysław Witwicki (30 April 1878 to 21 December 1948) was a Polish psychologist, philosopher, translator, historian (of philosophy and art) and artist. He is seen as one of the fathers of psychology in Poland.
Witwicki was also the creator of the theory of cratism, theory of feelings, and he dealt with the issues of the psychology of religion, and the creation of secular ethics. He was one of the initiators and co-founders of Polish Philosophical Society. He is one of the thinkers associated with the Lwów-Warsaw school.