'Montaillou, an Occitan Village from 1294 to 1324') is a book by the French historian Emmanuel Le Roy Ladurie first published in 1975.

It was first translated into English in 1978 by Barbara Bray, and has been subtitled The Promised Land of Error and Cathars and Catholics in a French Village.

[1] Ladurie used the inquisitorial records of Jacques Fournier to reconstruct the lives of the inhabitants of Montaillou in the Ariège (at the time, the county of Foix).

It is largely based on the Fournier Register, a set of records from the Inquisition which investigated and attempted to suppress the spread of Catharism in the Ariège region from 1318 to 1325, during the reigns of Philip V "the Tall" and Charles IV "the Fair".

[8] Montaillou was much more successful than either Ladurie or his publishers had anticipated, selling more than 250,000 copies and being translated into multiple languages.