In 2006, the Delizia was enriched with an archaeological collection, which became the Archaeological Museum in 2022: exhibited in the rooms on the ground floor, the exhibition preserves materials from a Roman necropolis from the 1st-2nd century AD, discovered by chance in 2002 at the bottom of Santa Caterina.
This is a family necropolis: four generations of the same family of Roman citizens, the Fadieni, landowners in the Po Delta, are buried here.
The necropolis has returned five steles and twelve burials, with indirect cremation, with grave goods: the deceased was cremated on the funeral pyre in a place dedicated to this, then his ashes were placed inside cinerary urns, which here are mostly made of glass. The five steles are positioned inside the structure as they were in the necropolis, respecting the distances and positions, even the materials of the grave goods are displayed in correspondence with the steles to which they refer.
The steles were the tomb markers, behind them were the actual burials, dug into the ground and covered with bricks, containing the cinerary urns and the grave goods, simple objects that recall everyday life.
In 2023, a new installation was created with digital and multimedia content, to improve the visitor experience and delve deeper into some topics.