Although the very first World's Fair was organised in Prague in 1791 to celebrate the coronation of Leopold II, it wasn't until the Great Exhibition held in London in 1851 that this incredible event came into the mainstream. Hosted at regular intervals since then, each fair was designed to bring together and showcase the achievements of different nations – an ethos that continues today.

Click through the gallery to see some of the most famous and influential buildings from World's Fairs that are still standing today...