Louis Paul Jonas created the first full sized dinosaur sculptures for the 1964 New York World's Fair in the "Dinoland" area, which was sponsored by the Sinclair Oil Corporation, whose logo featured a dinosaur. Jonas consulted with paleontologists Barnum Brown, Edwin H. Colbert and John Ostrom in order to create nine sculptures that were as accurate as possible. After the Fair closed, the dinosaur models toured the country on flatbed trailers as part of a company advertising campaign. Most of the statues are now on display at various museums and parks.