The nature of World Exhibitions has undergone a transformation over the centuries:
Initially, Expos were conceived as showcases for industry and performance, intended to serve as platforms for the achievements of industrialization, where countries presented their technological marvels. Architecturally spectacular buildings also played a major role: notably, the Crystal Palace in London, where the very first World Expo took place in 1851, and the Eiffel Tower in Paris, built for the occasion of the 1889 Expo.
After the World War II, the mission of World Exhibitions had turned to bringing nations closer together again.
Today, Expos focus on a global theme to raise awareness about its related challenges and showcase solutions offered by science, business and culture.
For more about the history of World Exhibitions, please visit the website of the Bureau International des Expositions (BIE).