Constantini Porphyrogeniti De administrando imperio -- See Constantine VII Porphyrogenitus, Emperor of the East, 905-959. De administrando imperio
5
Constantini Porphyrogeniti Imperatoris De cerimoniis aulae Byzantinae libri duo -- See Constantine VII Porphyrogenitus, Emperor of the East, 905-959. De ceremoniis. Greek (Reiske)