The sources -- Background: the principate -- Diocletian -- Constantine -- The house of Constantine -- The house of Valentinian -- The house of Theodosius -- The revival of the east and the fall of the west -- Justinian -- The successors of Justinian -- The emperor and his advisers -- The administration -- Finance -- Justice -- The civil service -- The army -- The two capitals -- The cities -- The church -- The aristocracy -- The middle and lower classes -- Agriculture -- Trade and industry -- Religion and morals -- Education, culture and art -- Why did the western empire fall?