The Slavonic Library is a continuously accumulating collection serving research related to Russia and Eastern Europe. The Legal Deposit Collection that was accrued in 1828–1917 includes deposit copies of printed matters in all subjects published within the borders of the Russian empire. From the Soviet period, the collection contains literature mainly from the fields of humanities and social sciences from the Soviet Union and other countries within the Slavic language area. The collection also includes emigrant literature. Acquisition of new materials is focused on the fields of humanities and social sciences within Russian and Eastern European studies.