Sejong the Great · every age What was Sejong the Great doing at 52? King at 21, created the Korean alphabet at 46 Apr 8, 1450Dies at 52Source: en.wikipedia.org See it at your age EarlierAt 49 Others at 52Yi Sun-sinBack as commander, with 12 ships leftBill GatesRetired from day-to-day work at MicrosoftJesse OwensConvicted of tax evasion and forced into bankruptcy at 52