408 Succeeds his father; his reign will be largely contemporary with that of his uncle Honorius and his cousin Valentinian III in the west; in the east, government is in hands of Anthemius, praetorian prefect; the emperor begins building a new city wall
409 Consul III (with Honorius VIII)
410 Rome is sacked by the Visigoths; Jews expelled from the army of the eastern empire
411 Consul IV (alone); Anysius liberates the Cyrenaica
412 Consul V (with Honorius IX); Constantinople gets new walls
414 Constantinople's city wall finished; Anthemius replaced as main adviser by Pulcheria, sister of Theodosius
415 Consul VI (with Honorius X); the Hagia Sophia opened for prayer
416 Consul VII (with Flavius Junius Quartus Palladius)
418 Consul VIII (with Honorius XII)
420 Consul IX (with "Constantius III" consul III); in the Sasanian Empire, Yazdgard I is succeeded by Bahram V
421, 7 June: Theodosius marries Athenais Eudocia II; in the west, Honorius makes Constantius (husband of Galla Placidia) his co-ruler ("Constantius III"), but Theodosius II refuses to recognize him; Constantius dies after six months
422 Consul X (with Honorius XIII); birth of Eudoxia III; inconclusive war with the Sasanian empire
423 Galla Placidia and her young son Valentinian III arrive in Constantinople; Eudoxia and Valentinian engaged; death of Honorius; usurpation of Johannes; Theodosius immediately recognizes Valentinian as emperor in the west
425 Consul XI (with Valentinian); Johannes succeeded by Valentinian; laws to reorganize education
426 Consul XII (with Valentinian III consul II)
427 Nestorius appointed bishop of Constantinople
428 Agreement with Sasanian Persia about the division of Armenia
435 Consul XV (with Valentinian III consul IV); Nestorius sent into exile
437 Eudoxia and Valentinian marry
438 Consul XVI (with Anicius Acilius Glabrio Faustus); Codex Theodosianus completed (15 February); Athenais Eudocia retires to Jerusalem; in the Sasanian Empire, Bahram V is succeeded by Yazdgard II
439 Consul XVII (with Flavius Rufius Postumius Festus); Vandals take Carthage
440 The Huns start to raid the Balkans
442 Theodosius agrees to pay off the Sasanian Empire
444 Consul XVIII (with Flavius Caecina Decius Aginatius Albinus)
447 Invasion of the Huns, who reach Thermopylae; Theodosius pays off Attila, who turns to the west
448 Eutyches the Archimandrite condemned (monophysitism); he appeals to pope Leo I
450 Theodosius falls from his horse and dies; his sister Pulcheria makes Marcianus emperor
414 Jews expelled from Alexandria; Hypatia lynched
420
Ivory plaque, showing the translation of some relics to a church in Constantinople; two bishops are welcomed by Theodosius II and Pulcheria.
Death of Jerome
425 Death of Gamaliel VI, last patriarch
434 Attila and Bleda gain control of the tribes of the Huns
438 Relics of John Chrysostom brought to Constantinople
444 Death of Cyrillus of Alexandria; Diocorus becomes patriarch of Alexandria; beginning of the monophysite discussion
