The World Will Come to an end in 1666

The Fifth Monarchists :
In the year 1666, the presence of 666 in the date, the death of 100,000 Londoners to bubonic plague, and the Great Fire of London led to superstitious fears of the end of the world from The Fifth Monarchists.

Schwartz, Hillel (1995), Century's End: An orientation manual toward the Year 2000, New York: Doubleday