World War II changed all of this , in 1939 , around 107,000 people lived in Białystok , but in 1946 -- only 56,759 , and to this day there is much less ethnic diversity than in the previous 300 years of the city 's history .
World War II changed all of this . In 1939 ca. 107,000 persons lived in Białystok , but in 1946 -- only 56,759 , and to this day there is much less ethnic diversity than in the previous 300 years of the city 's history .