This collection contains articles by Russian participants of the tripartite (Belgium–Russia– Bulgaria) international research project “Diversity and interaction of written cultures of Southern and Eastern Slavs in the 11th — 20th centuries”, which won the EU ERA NET RUS Plus competition. It was overseen by a scholarly team at the Institute of Slavic studies of RAS with the financial support of the RFBR (grant № 18–512–76004). Their articles are intended for the thematic halls of the virtual Museum of Slavic Cultures and will be published on the websites of the Bulgarian Academy of Sciences and the Belgian Ghent University in Russian and English. They relate to the written cultures of Russia, Belarus’, Ukraine, Bulgaria, Serbia, Croatia, Montenegro, North Macedonia, Slovenia, Bosnia and Herzegovina. These articles discuss the oldest monuments to the written word in these countries, famous saints and scribes, first typographers and writers, Slavist scholars, collectors of book treasures, and so on. The work is addressed not only to narrow specialists, but also to a wider audience — everyone who is interested in the culture of Southern and Eastern Slavs