The survey of the degradation of the Basilica Ulpia and the Aule di Testata highlighted the infiltration of rainwater in specific points of the perimeter walls and on the entire roof slab of the hypogeal rooms built in the 1930s. In particular, in the Basilica Ulpia and in the Latin Library there are instances of disintegration of the mortar with loss of material and emergence of reinforcing iron. With regards to the horizontal floors, there is a widespread state of deterioration and poor usability in all environments.

All interventions, in addition to a conservative and functional role, must pursue the objective of reinterpreting the cultural, typological and morphological characteristics of individual places.

The main intervention consists in the clean-up of water infiltrations and the restoration of the roof slab. In fact, in addition to a consolidation operation (reinforced screed), the complete reconstruction of the waterproofing layer is also necessary, which to ensure success would involve the laying bare of the structure in the extrados part through removal and restoration of the garden arrangement above.

Interventions on flooring must be distinguished based on the peculiar characteristics of each environment; the common element is the restoration of the fragments of ancient marble still present and the reintegration and reconstruction of a walkable floor plan in the Basilica Ulpia and in the Latin Library.

In consideration of the emptying of the slab for its clean-up, further interventions are necessary prior to the reopening of the warehouses to the public:

• insertion of a skylight, with the dual function of increasing ambient light and air circulation inside the warehouses;
• anastylosis of the grey granite column shaft currently placed inside the arboreal exedra;
• renovation of the systems;
• material handling;
• new shelving for the conservation and presentation of preserved materials.