The Century of Progress Exposition was a beacon of hope and a celebration of technological advancement during the Great Depression. This one-cent stamp, intended for postcard postage, features the second Fort Dearborn, which was reconstructed on the fairgrounds as a popular exhibit. The original fort, built in 1803, was a critical site in Chicago's early history and was destroyed during the War of 1812. Its depiction on this stamp served as a powerful symbol of Chicago's resilience and its transformation from a frontier outpost to a modern metropolis. The fair itself was a vibrant "Rainbow City" of Art Deco architecture, a stark contrast to the "White City" of the 1893 exposition, and it showcased innovations that would shape the future.