On the pillar between the Chigi and the Mellini Chapel is a Late Neo-Classical monument for the memory of Lieutenant Agostino Chigi (1858-1896), the first son of Prince Mario Chigi, who died in the Battle of Adwa in the First Italo-Ethiopian War. It was designed by Adolfo Apolloni in 1915. The shape of the gleaming white marble sepulchre follows the curve of the half-column behind. The stele of the inscription is flanked by two half-pillars with interesting Liberty style capitals of flowers and poppy-heads and two allegorical statues, the personifications of earthly and eternal life; the latter appearing as a serene angel holding up a burning lamp.