The Orleans was one of two dream cars built by the Cadillac Studio for the 1953 Motorama. It debuted that year at the Waldorf-Astoria show in New York City.The Orleans was very similar to the 1953 Cadillac Coupe de Ville in appearance with one significant difference. It was the first pillarless four-door hardtop automobile to be shown by General Motors. This feature would go into production for the 1955 model year on Buicks and Oldsmobiles. The Orleans also had a wraparound windshield, a feature that was displayed on many of the other dream cars for 1953 as well, as the production model 1953 Eldorado.

source: wiki.gmnext.com