The author has identified more than 400 manuscripts in the archival repositories of Russia and other countries containing information about the life and miracles of St. Sergius of Radonezh, the most revered Russian saint. New editions of the texts of the Life of Sergius have been opened, introduced into scientific circulation for the first time. New facts from the biography of Sergius are presented, data on the monastic reform in Rus' in the 14th century. The problem of the origin of Rublev's "Trinity" has been solved. The content of the work of the greatest ancient Russian writer Epiphanius the Wise is fully revealed. The famous Trinity Literary School has been replenished with new names of first-class masters. The book also contains the publication of the most important editions of the Life of Sergius of Radonezh. Original pdf -