Celebrate the Century is a series of postage stamps made by the United States Postal Service featuring images recalling various important events in the 20th century in the United States. Ten of these sheets were issued, with each sheet depicting events of one decade of the 20th century, from the 1900s to 1990s. Fifteen stamps were embedded into each sheet. For the first eight sheets (1900s to 1970s) of the fifteen stamps, one stamp of each sheet was printed using the intaglio process. First 8 (1900s thru 1970s) featured in this offer, all sealed in good condition. Issued 1998-1999.