Items within the Certificates Series date from 1919 to 2016, though the bulk of the items date from 1959 to 1998. The series contains the hundreds of paper-based recognitions presented to John Glenn over the course of his fifty years in public service. The certificates pay tribute to Glenn's activities and achievements in various phases of his life - military, NASA, corporate, and the U.S. Senate. The series also contains many items presented to Annie Glenn, along with items presented to the parents of both John and Annie Glenn.