David of Trebizond

David of Trebizond was the last emperor of Trebizond, a Byzantine successor state on the Black Sea. He came to the throne in 1459 after the death of his brother John IV and attempted to secure allies against the expanding Ottoman Empire. Mehmed II besieged Trebizond in 1461, and David surrendered after receiving assurances. Accused two years later of maintaining dangerous correspondence, he and most of his sons were executed in Constantinople, ending the male imperial line.

The fall of Trebizond forms part of Dorothy Dunnett’s House of Niccolò series, particularly The Spring of the Ram, which places merchants and diplomats amid the commercial and political networks of the Black Sea. David’s brief reign is useful to historical novelists because it combines dynastic rivalry, Genoese and Venetian interests, Ottoman expansion and the final afterlife of Byzantium. His motives at surrender are often interpreted through the tension between heroic resistance and responsibility for a civilian population.