The 300s decade ran from January 1, 300, to December 31, 309.
The 400s decade ran from January 1, 400, to December 31, 409.
Year 410 (CDX) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year after the Consulship of Honorius and Theodosius. The denomination 410 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The 380s decade ran from January 1, 380, to December 31, 389.
The 420s decade ran from January 1, 420, to December 31, 429.
Year 418 (CDXVIII) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Honorius and Theodosius. The denomination 418 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 415 (CDXV) was a common year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Honorius and Theodosius. The denomination 415 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 404 (CDIV) was a leap year starting on Friday of the Julian calendar. At the time, it was known as the Year of the Consulship of Honorius and Aristaenetus. The denomination 404 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 401 (CDI) was a common year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Vincentius and Fravitus. The denomination 401 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 399 (CCCXCIX) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Eutropius and Theodorus. The denomination 399 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
The 390s decade ran from January 1, 390 to December 31, 399
The 410s decade ran from January 1, 410, to December 31, 419.
The 330s decade ran from January 1, 330, to December 31, 339.
The 340s decade ran from January 1, 340, to December 31, 349.
The 350s decade ran from January 1, 350, to December 31, 359.
Year 384 (CCCLXXXIV) was a leap year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Ricomer and Clearchus. The denomination 384 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for giving names to years.
Year 350 (CCCL) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Sergius and Nigrinianus. The denomination 350 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 340 (CCCXL) was a leap year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Acindynus and Valerius. The denomination 340 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Year 337 (CCCXXXVII) was a common year starting on Saturday of the Julian calendar. At the time, it was known as the Year of the Consulship of Felicianus and Titianus. The denomination 337 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
Constantius III was briefly Western Roman emperor in 421. He earned his position as Emperor due to his capability as a general under Honorius, achieving the rank of magister militum by 411. That same year, he suppressed the revolt of Constantine III, a Roman general who had declared himself emperor. Constantius then went on to lead campaigns against various barbarian groups in Hispania and Gaul, recovering much of both for the Western Roman Empire. Constantius married Honorius's sister Galla Placidia in 417, a sign of his ascendant status, and was proclaimed co-emperor by Honorius on 8 February 421. He reigned for seven months before dying on 2 September 421.
