The Répertoire archéologique was one of the tools used by the Commission de Topographie des Gaules (CTG). Based on the information provided in forms completed by CTG correspondents and sent to Alexandre Bertrand, information about archaeological remains in each region and locality was recorded in this index. The geographer Chartier then located the remains with symbols on the maps.

[The illustrations on this page allow you to see each of the stages in the production of the archaeological map of Gaul, using the example of the site of Cormoz (or Château-Gaillard) in the Ain region.]