Is the image of Saint Sava presented on the medieval seals of Serbian Patriarchs?

The paper discusses the distinctive features of the seals of Serbianchurch leaders, with a special focus on the seal used bypatriarchs from the second half of the fourteenth to the middleof the fifteenth century. The same seal appears on originalcharters issued over a period of seventy years. I propose thatthe Serbian Orthodox Church in the Middle Ages developed aunique method of authentication, characterized by a distinctivewax seal. Special attention is given to the iconography ofthe rhomboid-shaped seal, with arguments presented in supportof the claim that the central figure depicts Saint Sava.