Czar
The great harlot is Nero's mother who committed fornication with Nero and was the inspiration of much anti-Christian persecution. Her devastation was allegorical when Nero turned on her and had her killed.
Very interesting. Doesn't it all make much more sense when you read about the history of the times. The same reason the book of Daniel makes more sense when applied to the Seleucid kings and anti-Jewish persecution.
CF.