Harvey Goldblatt suggested another radical reinterpretation in his essay "On the 'rous'kymi pismeniy' in the 'Vita Constantini' and Rus'ian Religious Patriotism." Goldblatt noted that the majority of preserved codices containing "Vita Constantini" are East Slavic (Goldblatt counted app. 40) and read "" but the numerically fewer South Slavic manuscripts read "," "," and "" (or corrupted forms that can be derived from it). Given that the earliest attestation for "Viti Constantini" is from the 15th Century, it cannot be assumed, according to Goldblatt, that they all reflect one uniform and complete text tradition, supposedly written in Moravia before 882. Glodblatt points to the oldest version of the Russian Church Slavonic text "" (The Story of Russian Writing), which was recorded immediately following a version of "Vita Constantini". While not presuming a direct relationship between the texts, notes that the ties the "Vita Constantini" directly to the Russia-centered ideology of the 15th Century "Rus'ian lands," after the defeat of the Slavs at the Battle of Kosovo in 1389 and the fall of Tarnovo, the Bulgarian capital, in 1393. With the loss of Constantinople to Muslim Ottoman Turks in 1453, there was a desire to see the transfer of religious and cultural power from the Greek Orthodox-influenced Byzantine and the Slavic Balkans to Muscovy. The notion of Cyril discovering "Russian letters" in Cherson or that he would have studied with a "Russian" in the Crimea would therefore be welcomed in 15th Century Muscovy, reinforcing the image of Moscow as the center of the true Orthodox faith.