Before the end of 1961 the New York publishing company Harcourt, Brace and Co. had the first edition of Lewis Mumford's highly successful book The City In History ready for publication. Two years later, in 1963, the National Film Board of Canada funded the production of six documentaries, each lasting 27 minutes, for a series entitled Mumford On The City. The closing titles confirm that the material for the films, based on The City In History, was prepared by Mumford himself.