 In 1891-94, in the yard between the palace and the "Krakowskie Przedmieście" gate, a library building was erected to a design by Antoni Jabłoński-Jasieńczyk and Stefan Szyller, and in 1910 a new "Krakowskie Przedmieście" gate was built.In 1929-31, the library building was rebuilt, and in 1930, the "Auditorium Maximum" building was erected to a design by Aleksander Bojemski.During World War II, the Kazimierz Palace was destroyed, along with other Warsaw University buildings.