Cerruti placed a billiard table in the basement of his villa and created an area to accommodate artworks of the 19th and 20th centuries. In terms of interior decoration, less care was taken with the rooms in the basement, which had a generally domestic character, than with those of a more formal character on the ground and first floors. The presence of a cellar of fine wines and a billiard table attests to the primarily recreational use of this part of the building, on occasions when guests were entertained.
Much of the space is occupied by the cumbersome table, which lost its original function over the years, not least due to the steady growth of the collection of rare books and precious bindings, serving as a surface to display items of particular importance.