 In 2006 these writers revived interest in the work of the scientist, Jean-Baptiste Noulet (1802-1890), who had explored the Tarn area in the mid-19th century and found evidence of human habitation in many of the caves there.Working in Penne in 1851, within a cave known as 'Le Cuzoul d'Armand' or 'Grotte Mazuc', Noulet found several prehistoric artifacts, including a bronze and pearl necklace, now held in the Noulet Collection at the Toulouse Museum.According to the historical account on the "Southwest Story" web site, "The first reference to a castle in the village of Penne dates from 825 AD and its first known señor was Geoffroi, mentioned in 1096 in documents related to Raymond, Count of Toulouse" .