Lilies of the Field

https://en.wikipedia.org/wiki/Lilies_of_the_Field_(1963_film)

Lilies of the Field is a 1963 American comedy-drama film adapted by James Poe from the 1962 novel of the same name.
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It tells the story of an itinerant worker who encounters a group of East German nuns, who believe he has been sent to them by God to build them a new chapel.