The present article seeks to introduce to readers the collections of Armenian manuscripts held at the National Library of Russia (112 items), at the St. Petersburg Branch of the Institute of Oriental Studies (441 items), the St. Petersburg State University (5 items), the State Hermitage (7 items), the St. Petersburg Branch of the Russian Academy of Sciences Archive (1 item), and the Institute of Russian Literature (1 item), 537 items in all. After the collections in Matenadaran (Erevan), Venice, Vienna, and Jerusalem, the Petersburg collections make up one of the largest in the world. The collections arose of their own accord and today provide a more or less full overview of medieval manuscripts. We do not speak here of the comparative value of individual manuscripts, but it is worth noting that several manuscripts are of obvious significance…