De Ceremoniis
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The De Cerimoniis or De Ceremoniis is the conventional Latin name for a Greek book of ceremonial protocol at the court of the Byzantine emperors in Constantinople, written in the middle of the 10th ce
Constantine VII Porphyrogenitus in a 945 carved ivory.
: Book of Ceremonies by Constantine VII Porphyrogennetos (book I, ch. 82): Leipzig, Universitätsbibliothek, Ms. Rep. I 17, f. 148r.
Peter the Patrician
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Peter the Patrician was a senior Byzantine official, diplomat, and historian. A well-educated and successful lawyer, he was repeatedly sent as envoy to Ostrogothic Italy in the prelude to the Gothic W
Emperor Justinian I (r. 527–565) and his entourage, mosaic from the Basilica of San Vitale in Ravenna