This album contains reports, photographs and visual records sent by Étienne Castagné to the Commission de Topographie des Gaules. His aim was to determine if the remains at Murcens were Uxellodunum. From the early 19^th century, photography began to be used to show prestigious archaeological remains, but not to document the archaeological work itself. This explains the specific focus of these photographs. The first photograph is a section view of the murus gallicus, in which we can see the wall’s masonry and the location of the six beams on either side. The wooden beams have disappeared over time, but have left behind hollow spaces which confirm their earlier presence.