Year 400 (CD) was a leap year starting on Sunday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Stilicho and Aurelianus (or, less frequently, year 1153 Ab urbe condita).

The 4th century was the time period from 301 CE (represented by the Roman numerals CCCI) to 400 CE (CD) in accordance with the Julian calendar. In the West, the early part of the century was shaped by Constantine the Great, who became the first Roman emperor to adopt Christianity.

400 AD Windmills Used In Persia -The Fifth Syrian War ended at the Battle of Banyais, between Antiochus II (King of the Seleucid Empire) and Ptolemy V of Egypt. The Egyptians were decisively defeated by Antiochus' forces, and were forced to cede all their territory -- with the exception of the Sinai Desert -- to the Seleucids.

41 A.D. Caligula is assassinated as a result of his extravagance and quest for unconstrained personal power. 43 A.D. London (Latin: Londinium) is established by the Romans. 45 A.D. Disciple (apostle) Paul begins his missionary works. 59 A.D. Agrippina is murdered by her son, Nero. 64 A.D. Great fire destroys much of Rome.

As the name suggests, BC or Before Christ refers to the number of years before Christ was born. AD or Anno Domini is the period after Christ was born. BCE and CE stand for 'Before Common Era' and 'Common Era' and are alternatives to BC and AD respectively.

Valerius Severus revolts and invades Italy. His father Maximian comes out of retirement first in his support, then in favor of Constantine. Severus killed in Pannonia and Maximian recognized as co-emperor. Marcellus is appointed as the new Pope in Rome. Exiled in …

Building upon the foundation laid by the Roman Republic, the empire became the largest and most powerful political and military entity in the world up to its time and expanded steadily until its fall, in the west, in 476. The legendary founding date of Rome. The Romans conquer Saguntum from the Carthaginians. The Romans conquer Gades.

317 AD Tatar Warriors Break Through Great Wall - Tatar warriors broke through the Great Wall of China that had been built during the Han Dynasty to provide Northern China with protection against invasion. The Tatars drove out the Western Chin Dynasty, which was forced to move its capital to Nanking.

Jan 24, 2025 · 400 : The first practical horse collar appears. Earlier versions choked the horse and limited their agricultural use. Horses quickly replaced some oxen since they are more efficient with feed. 400: The first autobiography in the Western world is written by Saint Augustine of Hippo when he completes The Confessions. He dies on 28 August 430 ...

What happened and who was notable in 400 AD? Browse important events, world leaders, notable birthdays, and tragic deaths from the year 400 AD.