The title page of the album made by Alphonse Le Touzé de Longuemar clearly illustrates the relationship built by this correspondent of the Commission de Topographie des Gaules and president of the Société des Antiquaires de l'Ouest with the musée gallo-romain, at the time still under development. When he gave this unique manuscript to the musée de Saint-Germain in October 1865, Longuemar began the museum’s archive collection, with its high scientific value.