Map with Birds eye view of the Worlds Columbian Exposition, Chicago, 1893 written on it at the Nikola Tesla Genius of modern electricity exhibition. Nikola Tesla (1856-1943) was a Serbian American physicist and electrical engineer. He is known for designing the alternating-current (AC) electric system. When the 1893 Chicago World Fair was illuminated using Nikola Teslas inventions for AC electricity and fluorescent lighting, it was a spectacle that amazed the world and it is still the predominant electrical system used across the world today. Photographed at CaixaForum Zaragoza in Spain, in collaboration with The Nikola Tesla Museum of Belgrade.