Detail of the Aurora - Side panel on the vault of the Hall of the Zodiac

The decoration made by Annibale Brugnoli consists of three canvases. The theme, introduced by the luminous figure of the Morning Star which alludes to the dawn of the day, culminates in the central canvas in which the scene is constructed according to an ascending trend: from the girl lying in the lower margin to the female figures in foreshortening holding garlands of flowers and they move joyfully in flight around the personification of the Aurora, wrapped in a very long cloth of brilliant colors, in the sky lit by the flaming light of the twilight and crossed by the rainbow. The latter completes its diagonal in the third square almost entirely occupied by clouds.