The 430s decade ran from January 1, 430, to December 31, 439.
The 510s decade ran from January 1, 510, to December 31, 519.
The 540s decade ran from January 1, 540, to December 31, 549.
The 420s decade ran from January 1, 420, to December 31, 429.
The 450s decade ran from January 1, 450, to December 31, 459.
The 440s decade ran from January 1, 440, to December 31, 449.
Marcian was Roman emperor of the East from 450 to 457. Very little is known of his life before becoming emperor, other than that he was a domesticus who served under the commanders Ardabur and his son Aspar for fifteen years. After the death of Emperor Theodosius II on 28 July 450, Marcian was made a candidate for the throne by Aspar, who held much influence because of his military power. After a month of negotiations Pulcheria, Theodosius' sister, agreed to marry Marcian. Zeno, a military leader whose influence was similar to Aspar's, may have been involved in these negotiations, as he was given the high-ranking court title of patrician upon Marcian's accession. Marcian was elected and inaugurated on 25 August 450.
Theodosius II was Roman emperor from 408 to 450. He was proclaimed Augustus as an infant and ruled as the Eastern Empire's sole emperor after the death of his father, Arcadius, in 408. His reign was marked by the promulgation of the Theodosian law code and the construction of the Theodosian Walls of Constantinople. He also presided over the outbreak of two great Christological controversies, Nestorianism and Eutychianism.
Hormizd III, was the seventeenth king (shah) of the Sasanian Empire, ruling briefly from 457 to 459. He was the son and successor of Yazdegerd II. His reign was marked by the rebellion of his younger brother Peroz I, who with the aid of one of the Seven Great Houses of Iran, the House of Mihran, and the eastern neighbours of the Sasanians, the Hephthalites, had him captured and executed.
Peroz I was the Sasanian King of Kings of Iran from 459 to 484. A son of Yazdegerd II, he disputed the rule of his elder brother and incumbent king Hormizd III, eventually seizing the throne after a two-year struggle. His reign was marked by war and famine. Early in his reign, he successfully quelled a rebellion in Caucasian Albania in the west, and put an end to the Kidarites in the east, briefly expanding Sasanian rule into Tokharistan, where he issued gold coins with his likeness at Balkh. Simultaneously, Iran was suffering from a seven-year famine. He soon clashed with the former subjects of the Kidarites, the Hephthalites, who possibly had previously helped him to gain his throne. He was defeated and captured twice by the Hephthalites and lost his recently acquired possessions.
Yazdegerd II, was the Sasanian King of Kings of Iran from 438 to 457. He was the successor and son of Bahram V.
Yazdegerd I was the Sasanian King of Kings of Iran from 399 to 420. A son of Shapur III, he succeeded his brother Bahram IV after the latter's assassination.
Yazdegerd III was the last Sasanian King of Kings from 632 to 651. His father was Shahriyar and his grandfather was Khosrow II.
Bahram V, also known as Bahram Gur, was the Sasanian King of Kings (shahanshah) from 420 to 438.
The Theodosian dynasty was a Roman imperial family that produced five Roman emperors during Late Antiquity, reigning over the Roman Empire from 379 to 457. The dynasty's patriarch was Theodosius the Elder, whose son Theodosius the Great was made Roman emperor in 379. Theodosius's two sons both became emperors, while his daughter married Constantius III, producing a daughter that became an empress and a son also became emperor. The dynasty of Theodosius married into, and reigned concurrently with, the ruling Valentinianic dynasty, and was succeeded by the Leonid dynasty with the accession of Leo the Great.
The Sasanian Empire, officially Ērānšahr, was the last empire of ancient Iran. Named after the House of Sasan, it endured for over four centuries, from 224 to 651, making it the second longest-lived imperial Iranian dynasty after the directly preceding Arsacid dynasty of Parthia.
The Roman–Sasanian war of 421–422 was a conflict between the Eastern Roman Empire and the Sasanians. The casus belli was the persecution of Christians by the Sassanid king Bahram V, which had come as a response to attacks by Christians against Zoroastrian temples; the Christian Eastern Roman Emperor Theodosius II declared war and obtained some victories, but in the end, the two powers agreed to sign a peace on the status quo ante.
The Sassanid Empire or Sassanian Dynasty is the name used for the Persian dynasty which lasted from 224 to 651 AD.
Denag, was a Sasanian queen (banbishn). She was the wife of the king (shah) Yazdegerd II, and functioned as queen regent in Ctesiphon during the civil war between her sons in 457–459.
The history of the Later Roman Empire covers the history of the Roman Empire from the beginning of the rule of Diocletian in 284 AD and the establishment of the Tetrarchy in 293 AD by Diocletian to the death of Heraclius in 641 AD.
