the end of the world would begin between 1200 and 1260.



Joachim of Fiore :
Joachim of Fiore, the Italian mystic determined that the end of the world would begin between 1200 and 1260.
http://en.wikipedia.org/wiki/List_of_dates_predicted_for_apocalyptic_events


Richard Kyle, The Last Days are Here Again. Baker Books, Grand Rapids MI, 1998