The division of the Roman Empire into the Western Roman Empire and the Eastern Roman Empire occurred in 395 AD. This event was due to the death of Emperor Theodosius I, the ruler of the Roman Empire and the emperor of the Eastern Roman Empire, who divided the empire between his two sons, Antiochus and Honorius. Antiochus inherited the rule of the Western Roman Empire, while Honorius inherited the rule of the Eastern Roman Empire. Since then, the Roman Empire has split into two independent regimes, located in Rome (Western Roman Empire) and Constantinople (Eastern Roman Empire). This split marked the division of the Roman Empire's territory and political power, which ultimately led to the decline and destruction of the Western Roman Empire, while the Eastern Roman Empire lasted for several centuries until it was conquered by the Ottoman Türkiye Empire in 1453.
In an alternate history, the Roman Empire split into the Western Roman Empire and the Eastern Roman Empire due to a different key factor: instead of religious differences, the split was driven by economic disparities. This fictional historical story explores the consequences of this change and predicts possible future developments.