Kiev Psalter of 1397 is one of the most famous East Slavic illuminated manuscripts. Created in 1397 by the Kievan scribe Spiridon, it passed through the hands of numerous Lithuanian nobles before being sold to the Russian Count Sergey Sheremetev in the mid-19th century. Courtesy of the count, its first printed edition was prepared by Nikodim Kondakov and Fyodor Buslaev. In 1932, the Sheremetev Library merged into the Russian National Library in St Petersburg.
 
Bron: en.wikipedia.org