 Wenanty Burdziński died of acute pneumonia before the end of 1928, and Jan Żabiński was appointed director.Before World War II, Jan oversaw the creation of several exhibits including the monkey house, elephant house, enclosures for antelopes, a seal pond, and the giraffe barn.He was director of the zoo until 1939, was re-appointed in 1949, and continued in the post until 1951.