de Heresi is home to the digital edition of BM Toulouse MS 609, the oldest extant original document from the first generation of public inquisition (inquisitio heretice pravitatis). This massive manuscript contains the depositions of over 5,500 people from over 100 villages around Toulouse in 1245-46. The depositions cover a wide range of subjects, from heresy to quotidian life in the thirteenth century. The site also features editions of other documents from the same period linked to the people in the depositions, allowing researchers to explore the lives and context of those first subjected to heresy inquisition.