The St. Cyril and St. Methodius National Library is the largest library in Bulgaria, located in the capital city of Sofia. Established in 1878, it serves as a key cultural and educational institution, housing millions of books, manuscripts, and other resources. The library is named after the two Byzantine brothers, Cyril and Methodius, who are credited with creating the Glagolitic alphabet and promoting literacy among the Slavic peoples. The library's collection includes a vast array of materials in various languages, making it a vital resource for researchers and students. It also hosts exhibitions, lectures, and cultural events, contributing to the promotion of Bulgarian heritage and literature. The St. Cyril and St. Methodius National Library plays an essential role in preserving the nation's history and fostering a love for reading.