The funeral monument is a typical Late Baroque artwork with distinctly macabre details. On the base there is a winged dragon, the symbol of the Boncompagni family. The plaque of the epitaph is made of polished, colored stones in pietre dure. The inscription is surmounted by the personification of Time (a winged skull), the coat-of-arms of the Principality of Piombino and two allegorical figures (Charity and Meekness). The plaque is set in a white marble frame with a conch in the lower part and a gable at the top with a shell, two flaming torches and another winged skull.