The monument shows the influence of Bernini's tomb for Maria Raggi in Santa Maria sopra Minerva. Posi used the heraldic symbols of the Chigi and the Odescalchi to celebrate the intertwining of the two princely families. In the lower part of the monument a white marble Odescalchi lion is climbing a mountain of the Chigi; to the right a smoking incense burner alludes to the Odescalchis again. A gnarled bronze oak tree (Chigi) grows from the mountain with a huge red marble robe on its branches. The robe is hemmed with gold and decorated with an epitaph made of golden letters and also the stars of the Chigi and the incense burners of the Odescalchi at the lower part. In the upper part of the tomb a white marble eagle and two angels are carrying the black and white marble portrait of dead which is set in a richly decorated golden medaillon.