History

Grenoble’s religious history at this specific site stretches back to the Roman period, when the settlement of Cularo stood as a fortified town with its own defensive rampart, and the cathedral’s later medieval and early modern development occupied ground already carrying centuries of prior significance — a continuity dramatically confirmed by the 1989 discovery of the 4th-century baptistery remains, a find that had gone entirely undetected through all the building’s medieval and early modern construction phases and only came to light following a period of 20th-century neglect during which restoration work had stalled by 1966. The baptistery’s rediscovery gave the cathedral renewed civic and diocesan significance, connecting the present building physically and historically to the earliest phase of organised Christian practice in the region, a connection now presented to visitors via the adjoining Musée de l’Ancien Évêché.

The ciborium’s history illustrates the broader pattern of religious violence that swept through French cities during the Wars of Religion (1562-1598): Bishop Siboud Alleman’s 1455 commission had produced, by the standards of Flamboyant Gothic ecclesiastical furnishing, an exceptionally ambitious 14-metre structure, its niches originally filled with sculpted figures forming part of the overall decorative programme, but the Calvinist forces under the Baron des Adrets who took Grenoble in 1562 specifically targeted this kind of elaborate Catholic devotional sculpture as part of the iconoclastic violence characteristic of the period’s religious conflict, destroying the ciborium’s statues while — notably — leaving the structure’s architectural framework itself largely intact, a pattern of selective destruction (removing figurative imagery while sparing architectural fabric) documented at numerous French churches during the same conflict.