From April 21 to October 21, 1962, Seattle played host to millions of people who sought out a glimpse into the future through the Century 21 Exposition. This world's fair presented an optimistic vision of "a future improved through science and technology" and this online collection from the Seattle Public Library presents over 1,200 photographs of the fair, along with books, brochures, reports, and more. The photos were taken by Werner Lenggenhager, a Swiss immigrant who donated his works to the Seattle Public Library after his death. Visitors can browse the suggested topics, which include Aerial Views, Space Needle, and Seattle Center Before Century 21. Visitors should also be sure to catch the six photos of Elvis Presley as he sang and danced his way across the grounds while filming, "It Happened at the World's Fair."