Newton was knighted by England's Queen Anne. On this day he was going to be recognized as Sir Isaac Newton. He was knighted at age 62 because of his work on gravity, telescopes, motion, chemistry, and many other things. The major reason for Newton to be knighted, over all his other achievements, was for publicity. It would give him a much better chance for him to be re elected for a seat in parliament, for his third time (historychannel.com).