When WWII broke out, the library wasn’t evacuated as there wasn’t enough time to do it. As soon as Minsk was liberated, the reconstruction of the library began almost from scratch. Under Iossif Simanovskiy, bits and pieces of the library holdings were brought back and by 1949 all library departments resumed their operations.
Iossif Simanovskiy addressed the country’s leadership with a proposal to use books from the Wroclaw, Gdansk and Königsberg libraries as restitution for the destroyed book stocks in Belarus. Unfortunately, this project didn’t take off. However, the Soviet troops found lots of books that had been stolen from the library and displaced during the war. Some of them turned up in Prague and others in Königsberg. But the bulk of the displaced books were discovered in the small town of Ratibor in the west of Poland. Over 600,000 books were brought back, including F. Skorina’s valuable editions from V. Komarnitskiy’s collection, which had already been packed to be dispatched to one of Germany’s libraries.