http://www.batmobilehistory.com/1966-batmobile.php

In the late summer of 1965, an all-new Batman TV series was gearing up, with Dean Jeffries hired to build a Batmobile for the show. When the show's production schedule was moved up, Jeffries had to pass on the job, which then went to custom car builder George Barris. With merely three weeks to build the car, Barris decided to use the Ford Motor Company's abandoned Futura concept car as a basis for what would go on to become one of the most famous cars in the world.