Not this theory. We discussed the likelihood that 666 was written DCLXVI which is the letters used in the Roman Numeral system in their proper order, and thus pointed to the Roman Empire as the beast. (I have read that some ancient texts of Revelation have the number of the beast as 1666 which would be MDCLXVI)
Wait a minute — weren’t you guys also discussing this in 430 AD when Attila was at the gates? :) and then Alaric sacked the city later? and in 999? and when the Mongols threatened Europe? and on September 11, 1683 :)