Sotterranei del Duomo

Beneath Orvieto Cathedral's transept lies the building's own memory: about 800 square metres of tunnel where the Fabbrica stored stone and tools for centuries. The Sotterranei preserve workshop material in its historic setting.

Why it matters

Unlike displays focused on the finished cathedral, these spaces preserve material evidence of its construction. The space below the transept and the chapels preserves what the official Duomo operator calls a realistic cross-section of the cathedral's ancient deposit — the storage area of the Fabbrica, the institution that directed the building's construction and upkeep across centuries. These are the actual rooms where the worksite's materials were stored, with equipment from the long building campaign preserved in the galleries. They document the materials and processes behind the construction of Orvieto's cathedral.

What to notice

The space preserves evidence of continuity between historic and modern use. The operator's account describes tools and utensils from centuries of construction alongside materials and machinery used in cathedral maintenance and restoration, documenting the ongoing work of the Fabbrica. Leftover artefacts and fittings are presented as testimony to what the site calls an extraordinary historical, artistic and ethno-anthropological heritage. The galleries now also serve as exhibition spaces, placing temporary displays inside medieval service rooms. The roughly 800-square-metre area beneath the church's north half explains its long use as a cathedral warehouse.

Context and history

The underground was reorganised at the end of the nineteenth century, when the cathedral's custodians created proper deposits and warehouses here to serve ongoing maintenance and restoration work. That renovation established the current layout and presented the Fabbrica's working history: the present display narrates the centuries-long construction site, from the 1290 foundation of the church through the long campaigns that finished the fabric and decorated it. The Sotterranei are distinct from Orvieto Underground, the separate cave-city network beneath private houses across town; these spaces are the cathedral's own undercroft.