Fomenko's New Chronology
Nothing in history happened more than 1200 years ago. Most stuff? Happened in the last 1000 years.
At the very least, you could rub the serial numbers off and have a decent timeline for a fantasy setting that doesn't go completely weird.
"There is happiness for those who accept their fate, there is glory for those that defy it."
"Now that everyone's so happy, this is probably a good time to tell you I ate your parents."