The Fall of the Roman Empire By bheppner Period: 200 to 300 Rome's economy weakens/ inflation rises. Period: 200 to 500 Germanic Tribes invade the Roman Empire. 312 Constantine becomes emperor. Period: 312 to 337 Constantine rules the empire. 325 The Council of Nicea adds to the power of the Catholic Church. 330 Contantine moves the capital to Byzantium and renames it Constantinople. 476 Odoacer and the Visigoths capture the city of Rome and end the Western Roman Empire. Mar 2, 2022 Emperor Commodus is assassinated by his own bodyguards. Mar 2, 2022 Diocletian divides the empire into four parts and attempts other reforms. Mar 2, 2022 The Roman Empire is divided into two parts by Emperor Theodosuis. Mar 2, 2022 The Visigoths defeat the Roman Army at the Battle of Adrianople. Period: Mar 2, 2022 to 235 The Severan Emperors rule the Roman Empire and help to weaken it significantly.