 Among Yedikule's most notable prisoners was the young Sultan Osman II, who was imprisoned and executed there by the Janissaries in 1622.The last Emperor of Trebizond David Megas Komnenos, Constantin Brâncoveanu of Wallachia with his family, King Simon I of Kartli, and a number of leading Ottoman pashas were also among those executed there.In 1768, the Russian ambassador Aleksei Mikhailovich Obreskov, and the entire Russian embassy's staff was imprisoned here, marking the Ottomans’ declaration of war on Russia.