From the article:
As Marie-Pierre avers, the truth about the Cagots is obscure. The people first emerge in documents around the 13th century. By then they are already regarded as an inferior caste, the "untouchables" of western France, or northern Spain. In medieval times the Cagots – also knows as Agotes, Gahets, Capets, Caqueux, etc – were divided from the general peasantry in several ways. They had their own urban districts: usually on the malarial side of the river. These dismal ghettoes were known as Cagoteries; traces of them can still be found in Pyrenean communities such as Campan or Hagetmau.
For hundreds of years, Cagots were treated as different and inferior. In the churches, they had to use their own doors (at least 60 Pyrenean churches still boast "Cagot" entrances); they had their own fonts; and they were given communion on the end of long wooden spoons. Marie-Pierre adds: "When a Cagot came into a town, they had to report their presence by shaking a rattle. Just like a leper, ringing his bell."