SS. Cyril and Methodius National Library SS. Cyril and Methodius National Library 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. Founded on 4 April 1878, the library received the status of Bulgarian National Library three years later and the Bulgarian National Revival Archive was merged into it in 1924. It is named after "SS. Cyril and Methodius"; Saints Cyril and Methodius. They are the creators of the Glagolitic alphabet. The Cyrillic alphabet is named after Cyril. The present building of the library is among the landmarks of
Old Turkic alphabet Old Turkic alphabet The Old Turkic script (also known as variously Göktürk script, Orkhon script, Orkhon-Yenisey script) is the alphabet used by the Göktürks and other early Turkic khanates during the 8th to 10th centuries to record the Old Turkic language. The script is named after the Orkhon Valley in Mongolia where early 8th-century inscriptions were discovered in an 1889 expedition by Nikolai Yadrintsev. These Orkhon inscriptions were published by Vasily Radlov and deciphered by the Danish philologist Vilhelm Thomsen in 1893. This writing system was later used within the Uyghur Khaganate. Additionally, a Yenisei variant is known from 9th-century