The slaying of "the third part of men" was interpreted by some Christian scholars to refer to the fall of the Eastern Orthodox part of Christianity, centered on Constantinople in the year 1453 AD. (The other two-thirds being the Western Christian world, centered on Rome, and the southern part of the Christian world in North Africa, which was already under the dominion of Islam long before 1453.) Using the day-year principle, the formula gives 1+30+360 days = 391 days = 391 years after 1453. Adding 391 years to 1453 brings the prediction again to 1844, the same year as the 2300 day prophecy of Daniel 8.