[2][3] This is commonly held to have been Constantine XI Palaiologos, the last Byzantine emperor, who fell during the fall of Constantinople to the Ottoman Sultan Mehmed II in 1453.
[4] The brothers were captured during the fall of Constantinople, converted to Islam, and raised as pages under the auspices of Sultan Mehmed II as part of the devşirme system.
[2][5] The exact identity of his father is unclear; Sphrantzes adds the name of "Thomas" to "Gidos", while several scholars, beginning with Martin Crusius, rather improbably equated the latter name to the Venetian "Guido", Latin "Vitus".
[8][10] When Mahmud Pasha Angelović was dismissed as Grand Vizier and beylerbey (governor-general) of the Rumelia Eyalet in c. 1468, Hass Murad succeeded him in the latter position.
Other historians, however, including contemporary Greek and Latin sources, accuse Mahmud Pasha of knowing about the ambush and failing to warn Murad, because he was jealous of him.