What was the film that Colonial Williamsburg showed to visitors in the early 1950s?

What was the film that Colonial Williamsburg showed to visitors in the early 1950s?
It was called Williamsburg-The Story of a Patriot. The film debuted on March 31, 1957. Until then there were no films shown at Colonial Willamsburg. It has the istinction of being the longest running film in the history of movies.