The Sunsphere in Knoxville Tennessee is an 81.07 m (266 ft) high hexagonal steel truss structure topped with a 23 m (75 ft) gold-colored glass sphere that served as the symbol of the 1982 World's Fair. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Answer:
Building