America's 'flop' of a sesquicentennial NPR | By Rachel Treisman Published July 3, 2026 at 1:15 PM PDT LinkedIn Email Philadelphia hosted a hugely successful World's Fair to mark the U.S. centennial in 1876. The city hosted another one 50 years later for the sesquicentennial, but things didn't go smoothly. Copyright 2026 NPR