After the war, especially in the first half of the 1950s, the character of the library was significantly compromised by acquisitions of unrelated Soviet literature. In 1956, the Slavonic Library gradually began to return to its original mission. It revived its original scheme of acquisition and international cooperation, in particular in the exchange of publications. Nevertheless, it was not possible to renew the scientific activities of the Slavonic Library and re-establish the severed ties with western institutions focused on Slavic Studies until the social and political changes in 1989.