William Petty, English economist and philosopher (born 1623)

Sir William Petty was an English economist, physician, scientist and philosopher. He first became prominent serving Oliver Cromwell and the Commonwealth in Ireland. He developed efficient methods to survey the land that was to be confiscated and given to Cromwell's soldiers. He also remained a significant figure under King Charles II and King James II, as did many others who had served Cromwell.

December 16 is the 350th day of the year in the Gregorian calendar; 15 days remain until the end of the year.