Résumé :
Over forty years ago the Centre de Recherches Slavo-Byzantines «Ivan Dujcˇev» at the University of Sofia «St. Clement of Ohrid» (1988) was inaugurated, thereby making the largest collection of Greek manuscripts preserved in Bulgaria accessible to scholars. Subsequently, thanks to the collaboration of Greek and Bulgarian researchers, the collection was described in a Check-list which appeared in 1994. In recent decades, thanks also to the increasing number of digitized Greek manuscripts that are published on the web, various fragments and detached portions of manuscripts preserved in Sofia have been identified in several other libraries around the world, or have come to light through Sotheby’s auction sales. It is to be hoped that a large part of the Sofia manuscripts that still show lacunae can be at least virtually made whole again through the work of the future generations of researchers. The author of this article limits herself t presenting some case studies on which she has carried out research in recent years. These include: the codices Serdicenses Dujcˇev gr. 132, 177, 272, 339, where traces of now missing miniatures still remain; Dujcˇev gr. 340, a fragment of which has been recently reported to be in Tokyo; Dujcˇev gr. 369, parts of which were found in the United States of America; Dujcˇev gr. 353, part of which is now kept in St. Petersburg; Dujcˇev gr. 228, a quire of which reappeared at an auction at Sotheby’s and was bought there for the Schøyen Collection (Oslo/London).