Catalog of the seals of the Byzantine emperors І? - KhІ? centuries, stored in the Hermitage, includes 222 copies and covers the time from the reign of emperors IV century. until the reign of Andronicus IV Paleolog (1376-1379). It is based on two collections: RAIK and N.P. Likhachev. The collection also included seals from the collection of S. G. Stroganov, from finds in Chersonesos, the collection of the Imperial Hermitage, etc. The publication is designed for specialists in Byzantine sphragistics, historians of Byzantium and a wide range of readers interested in the period of the Middle Ages.