Philadelphia Celebrates: Three Great Anniversaries 1876, 1926, 1976. A remarkable account of the Centennial, Sesquicentennial, and Bicentennial celebrations of the American Declaration of Independence, Philadelphia Celebrates lays bare the motivations behind the planning and execution of these celebrations. Far more than just a history, this book is, above all, a portrait of the people who made these celebrations possible: the rebels, the crooks, the advocates, and the citizens forgotten in the shadow of politicians' egos.