Galileo is based on Charles Laughton's 1947 adaptation of the play by Bertolt Brecht, which, like this 1975 film, was directed by Joseph Losey. The film is filmed in England. It is about a 17th century Italian astronomer, whose theories run contrary to the edicts of the Catholic Church. Forced to renounce his ideas about planetary movement, Galileo nonetheless holds fast to those beliefs to the end of his days, certain that time will justify him. Brecht's trademarked "alienation" technique; so that the audience is constantly reminded that it is watching a play.