to assume control in Tarnovo with Byzantine support, but Peter forced him to flee to the Byzantine Empire. Peter charged Kaloyan with the governing of Asen's realm. Family Asen fathered at least two sons, Ivan Asen and Alexander. Ivan Asen, who was born around 1193, became the emperor of Bulgaria in 1218. His younger brother, Alexander, bore the title sebastokrator during Ivan Asen II's reign. See also Asen Peak Notes References Sources Primary sources George Akropolites: The History (Translated with and Introduction and Commentary by Ruth Macrides) (2007). Oxford University Press. . O City of Byzantium, Annals of Niketas Choniatēs (Translated by Harry J. Magoulias) (1984). Wayne State University Press. . The Conquest of Constantinople: Robert of Clari (Translated with introduction and notes by Edgar Holmes McNeal) (1996). Columbia University Press. . "The History of the Expedition of the Emperor Frederick". In The Crusade of Frederick Barbarossa: The History of the Expedition of the Emperor Frederick and Related Texts (Translated by G. A. Loud) (2013). Ashgate Publishing. pp. 33–134. . Secondary sources External links |- 13th-century births 1196 deaths 12th-century murdered monarchs 12th-century Bulgarian emperors Deaths by stabbing in Bulgaria Murdered Bulgarian monarchs Eastern Orthodox monarchs Asen dynasty Bulgarian people of the Byzantine–Bulgarian Wars