The SS. Cyril and Methodius National Library (Национална библиотека „Свети Свети Кирил и Методий“) is the national library of Bulgaria, situated in the capital city of Sofia near the Sofia University. Founded on 4 April 1878.
The library is Depository for all documents published in Bulgaria. It houses monographies, periodic issues and other documents in foreign languages, published all over the world. Currently the fund consists of 7 808 928 library items.
The present building of the library is among the landmarks of Sofia. It was designed by the famous Bulgarian architectural team Vasilyov-Tsolov and completed in the period 1940-1953.