400s | dn2=410s | dn3=420s }} Events By Place Roman Empire 23 January — Emperor Theodosius I proclaims his nine year old son Honorius Augustus. Theodosius I outlaws the Olympic Games, ending a thousand years of festivals, as part of the general Christian policy to establish universal Christian worship in accordance with the doctrines set forth in the Nicene Creed. Asia Gao Zu succeeds Tai Zu as Emperor of the Later Qin Empire in China. Births Theodoret of Cyrrhus, influential author… (More on 393)