rev:17:1-6 ; the great harlot ; royalty to/of the devil ???

Imperial Purple (Tyrian Purple): Ancient Greece and Rome
Main article: Tyrian purple
The actual color of Tyrian purple, the original color purple from which the name purple is derived, is the color of a dye made from a mollusk that, because of its incredible expense (many times more expensive than gold), in classical antiquity became a symbol of royalty because only the very wealthy could afford it. Therefore, Tyrian purple is also called imperial purple.
Tyrian purple may have been discovered as early as the time of the Minoan civilization. Alexander the Great (when giving imperial audiences as the emperor of the Macedonian Empire), the emperors of the Seleucid Empire, and the kings of Ptolemaic Egypt wore Tyrian purple. The imperial robes of Roman emperors were Tyrian purple trimmed in metallic gold thread. The badge of office of a Roman Senator was a stripe of Tyrian purple on their white toga.[2]Tyrian purple was continued in use by the emperors of the Eastern Roman Empire until its final collapse in 1453.