<Tr> <Th> Architect </Th> <Td> Community Tectonics </Td> </Tr> <Tr> <Th> Structural engineer </Th> <Td> Stanley D. Lindsey and Associates, Ltd . </Td> </Tr> <P> The Sunsphere, in Knoxville, Tennessee, is a 266 ft (81 m) high hexagonal steel truss structure, topped with a 75 ft (23 m) gold - colored glass sphere that served as the symbol of the 1982 World's Fair . </P> <P> Designed by the Knoxville architectural firm Community Tectonics, the Sunsphere was created as the theme structure for the 1982 World's Fair . It was noted for its unique design in several engineering publications . </P>

What is the gold sphere in knoxville tn