[Wings of Fire]

Also, it doesn't take into account the theory that the dark ages didn't actually happen and are down to a mistake that occurred when changing to a counting year system.

http://www.damninteresting.com/the-p...me-hypothesis/

My flatmate, who is a historian, punches me every time I use the term 'Dark Ages', I ignored that aspect because I was waiting for someone who could explain it better than I could.