Charlemagne and the Byzantine Emperors ruled countries with the same name, Empire of the Roman People. Since the Byzantines got the name first, they were a bit upset when Charlemagne took it.
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Justinian I
The two emperors who tried to restore order in the Roman Empire were Diocletian and Constantine I (or the Great).
he anted you booy
It was to expensive to restore the old Roman Empire
Frescoes were less widespread in the Byzantine period than in the classical period. They were often replaced by wall mosaics.