__NOTOC__ 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 denomination 400 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. It was the 400th year of the Common Era (CE) and Anno Domini (AD) designations, the 400th year of the 1st millennium, the 100th and last year of the 4th century, and the 1st year of the 400s decade.
Events <onlyinclude>
By place
Roman Empire
January 9 – Emperor Arcadius gives his wife Aelia Eudoxia the official title of Augusta.Chronicon Paschale, s.a. 400. Translated by Michael and Mary Whitby, Chronicon Pachale: 284-628 AD (Liverpool:University Press, 1989), p. 57 She is able to wear the purple paludamentum and is depicted in Roman currency. Anthemius, praetorian prefect of the East, is sent on an embassy to the Persian capital, Ctesiphon, to congratulate King Yazdegerd I on his accession the year before. A riot breaks out in Constantinople; the Great Palace is burned to the ground. Gainas, a Gothic leader, attempts to evacuate his soldiers out of the city, but 7,000 armed Goths are trapped and killed by order of Arcadius. After the massacre, Gainas tries to escape across the Hellespont, but his rag-tag ad hoc fleet is destroyed by Fravitta, a Gothic chieftain in imperial service. Winter – Gainas leads the remaining Goths back to their homeland across the Danube. They meet the Huns and are defeated; the Hunnic chieftain Uldin sends the head of Gainas to Constantinople, where Arcadius receives it as a diplomatic gift.
Europe
The Paeonians (Illyricum) lose their identity (approximate date).
Asia Richū, the eldest son of Nintoku, becomes the 17th Emperor of Japan.
By topic
Art Resurrection and "Two Marys with Angel near the Empty Tomb", panel of a diptych, found in Rome, is made. It is now kept at Castello Sforzesco, Milan (approximate date).
Literature The Vergilius Vaticanus, an illuminated manuscript containing fragments of Virgil's Aeneid and Georgics, is made in Rome. The Yoga Sutras of Patanjali are composed.
Medicine Caelius Aurelianus, Roman physician, is practising his work "De morbis acutis et chronicis" (Concerning Acute and Chronic Illness), a guide to acute and chronic diseases.
Physics Hypatia, Greek philosopher, distinguishes herself as one of the first female scientists and becomes head of the Neo-Platonist school at Alexandria.
Religion The mausoleum of Galerius in Salonica (Greece) is converted into a church. Bishops from Gaza (Palaestina Prima) arrive at Constantinople to ask Arcadius that he close the pagan temple of Marnas.
Births Aspar, Alan patrician and general (magister militum) (approximate date) Bahram V, Sasanian King of Kings (shahanshah) Hassan Yuha'min, king of the Himyarite Kingdom Hydatius, bishop of Aquae Flaviae (modern Chaves, Portugal) (approximate date) Pope Leo I, Bishop of Rome Qusayy ibn Kilab, Ishmaelite descendant of Abraham Salvian, Christian writer (approximate date) Sozomen, Christian Church historian
Deaths Castor of Karden, Christian priest and hermit Duan, Chinese empress and wife of Murong Bao Gainas, Gothic chieftain and general (magister militum) Li Lingrong, empress and mother of Jin Xiaowudi Lü Guang, emperor of the Di state Later Liang (b. 337) Lü Shao, "Heavenly Prince" (Tian Wang) of Later Liang Oribasius, Greek medical writer and physician
References