Montaillou examines the lives and beliefs of the population of
Montaillou, a small village in the
Pyrenees with only around 250 inhabitants, at the beginning of the fourteenth century. 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". The work is in two parts. The first explores the physical world of the inhabitants of Montaillou, telling the stories of
Pierre and
Bernard Clergue, two of the most powerful men in Montaillou, and the shepherd
Pierre Maury. The second explores the beliefs of the residents of Montaillou: what
Annales historians called their
mentalité. ==Historiography==