Wikipedia
Montaillou ( occitan Montalhon) is a commune in the Ariège department in the south of France. Its original, medieval location was abandoned and the current village is a short distance away.
Montaillou (French: Montaillou, village occitan de 1294 à 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.
Montaillou was Ladurie's "most important and popular work". 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). The work was part of the historical anthropology of the Annales school.