In August 2025, an exceptional mausoleum dating to the 1st century AD was uncovered as part of a training excavation led by Giulia Ciucci, Head of Archaeological Sites at the Saint-Romain-en-Gal Museum and Associate Researcher at the Centre Camille Jullian, with scientific co-direction by Corinne Rousse, Professor at Aix-Marseille University and member of the Centre Camille Jullian, and with the participation of researchers and associate researchers from the laboratory.

Among the roughly twenty tumulus tombs recorded in Gaul, modeled on Late Republican Italian mausolea—most notably the famous Mausoleum of Augustus in Rome—the Saint-Romain-en-Gal monument stands out as one of the best preserved. With an internal diameter of 15 meters and a substantial elevation, it would have been visible from the Narbonensis road and from the Rhône River, commemorating its builder, undoubtedly a prominent figure of the colony of Vienna. Further excavation will allow a better understanding of the mausoleum’s architecture, the deposits within the funerary chamber, and the monument’s immediate surroundings, in an area previously identified as an urban district of Vienne on the right bank of the Rhône.