Over the past 40 years, the increase in the number of archaeological excavations of large funeral complexes in France has led to a considerable increase in the number of human remains in the State’s excavation sites. These remains are not strictly speaking part of the archaeological material but are instead considered “scientific documentation”. On the one hand, the requirements of science necessitate the mobilization of all available techniques in order to better understand the populations that have left us these traces. On the other hand, material and cultural limitations necessarily lead to sampling techniques being seen as an efficient archaeological system. On the other hand, the mission of general interest that is archaeological research requires particular care be taken with these remains, sparing them from an overly managerial and short-term vision. The ethical virtues of archaeological excellence must not be forgotten; archaeological knowledge must be based on the requirement of scientific rigour. This primary requirement is questioned in particular by the choices made in the management of human remains collections. A second ethical requirement leads to questions about the legal or moral limits of the first. Should scientific rigour be limited in certain cases, particularly when the research involves human remains? Should remains be subject to a specific legal or ethical status that would distinguish them from other elements of archaeological material? This article addresses these questions through the prism of the study of the case of the perfectly preserved body of Louise de Quengo, a 17th century Breton noble discovered in 2014 in Rennes (France).