The first world’s fair recognized by the Bureau of International Expositions was the Great Exhibition of 1851, held in and around a glass structure called the Crystal Palace in London’s Hyde Park. Thirty-two countries participated in the almost six-month-long event, which attracted more than six million visitors. Few souvenirs of the event remain, and even the Crystal Palace is gone (in 1854 it was moved to Sydenham in South London, where it...Continue Reading