Although he was born in Katowice where his father Stanislaw worked as the Katowice Bank Director, he spent most of his life in Krakow. Once the Nazis and the Soviets invaded Poland in September 1939, and Stanislaw Maslowski was murdered by Soviet NKVD in Katyn, Wladyslaw’s family moved back to Krakow to join other family members who were running a pharmacy store, still in existence today, at 4 Mikolajska Street.