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:''There were also a Theodosius II of Abkhazia and a Patriarch Theodosius II of Alexandria. Additionally, Pope Theodoros I of Alexandria is also known as Theodosius II in Coptic history.'' Theodosius II ((ラテン語:Flavius Theodosius Junior Augustus);〔Consular diptych of 430〕 10 April 401 – 28 July 450),〔"Theodosius II" in ''The Oxford Dictionary of Byzantium'', Oxford University Press, New York & Oxford, 1991, p. 2051. ISBN 0195046528〕 commonly surnamed Theodosius the Younger,〔Gibbon, Edward. ''The Decline and Fall of the Roman Empire'', Chapters 32 & 34〕 or Theodosius the Calligrapher, was Byzantine Emperor from 408 to 450. He is mostly known for promulgating the Theodosian law code, and for the construction of the Theodosian Walls of Constantinople. He also presided over the outbreak of two great christological controversies, Nestorianism and Eutychianism. ==Life== Theodosius was born in 401 as the only son of Emperor Arcadius and his Frankish-born wife Aelia Eudoxia. Already in January AD 402 he was proclaimed co-Augustus by his father, thus becoming the youngest person ever to bear this title in Roman history.〔http://www.roman-empire.net/constant/theodosius-II.html〕 In 408, his father died and the seven-year-old boy became Emperor of the Eastern half of the Roman Empire. Government was at first by the Praetorian Prefect Anthemius, under whose supervision the Theodosian land walls of Constantinople were constructed. In 414, Theodosius' older sister Pulcheria was proclaimed Augusta and assumed the regency. By 416 Theodosius was declared Augustus in his own right and the regency ended, but his sister remained a strong influence on him. In June 421, Theodosius married Aelia Eudocia, a woman of Greek origin. The two had a daughter named Licinia Eudoxia. Theodosius' increasing interest in Christianity, fueled by the influence of Pulcheria, led him to go to war against the Sassanids (421–422), who were persecuting Christians; the war ended in a stalemate, when the Romans were forced to accept peace as the Huns menaced Constantinople.〔Warren T. Treadgold, ''A history of the Byzantine state and society'', Stanford University Press, 1997, ISBN 0-8047-2630-2, p. 90.〕 In 423, the Western Emperor Honorius, Theodosius' uncle, died and the ''primicerius notariorum'' Joannes was proclaimed Emperor. Honorius' sister Galla Placidia and her young son Valentinian fled to Constantinople to seek Eastern assistance and after some deliberation in 424 Theodosius opened the war against Joannes. On 23 October 425, Valentinian III was installed as Emperor of the West with the assistance of the ''magister officiorum'' Helion, with his mother acting as regent. To strengthen the ties between the two parts of the Empire, Theodosius' daughter Licinia Eudoxia was betrothed to Valentinian. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Theodosius II」の詳細全文を読む スポンサード リンク
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