Holy Trinity Seminary Library holds nearly 48,000 cataloged volumes as well as approximately 20,000 still lacking electronic bibliographic description. The library has a significant historical collection relating to Russian Orthodoxy and the Russian emigration. About half the collection is Russian or Slavic, approximately half of which is considered unique, being made up of rare pre-revolutionary theological, historical, and philological titles as well as interwar émigré publications. The library's collection concentrates on all areas of Slavic and Orthodox studies with particularly strong holdings in Russian and Russian Orthodox studies. Holy Trinity Seminary Library, located in the lower level of the Seminary building, is open to the general public for educational and research purposes.