BC   2000				Babylonians and Egyptians use various values of π
BC   1250				Egyptian pharaoh ate something like pi(e)
BC   1200				Chinese use π = 3
BC   550				1 Kings 7:23 implies π = 3
BC   440				Hippocrates of Chios squares the lune
BC   434				Anaxagoras attempts to square the circle
BC   420				Hippias of Elis discovers the quadratix
BC   335				Dinostratus squares the circle
BC   250				Archimedes finds a range in which π fits
BC   225				Apollonius improves on Archimedes's approximation