The painting represents the Martyrdom of the Seven Brothers, the sons of Saint Felicitas. The Holy Felicitas is prostrated to the right of the middle, as she comforts her youngest son Martialis and points to the angel who comes flying from above with the seven crowns and seven palm branches of martyrdom. The statue of Mars, right behind her, represents the pagan gods who refused to worship the early Christian widow. To the left of the statue, the Roman emperor Antoninus Pius was seated on a throne, ordering Felicitas to witness the death of her seven sons before being executed herself. Right in the foreground, the Holy January (flagged with lead balls); in the middle and left in the foreground, the Saint Alexander and the decapitated Vitalis; in the middle, sitting and kneeling, Saint Phillippus and Felix; In the background, Saint Silvanus is thrown off the tower. In the background a hedge of spectators and an image of one of the Vestal Virgins in a niche. To the left of the base of the Mars statue a self-portrait of Trevisani, looking out the painting. All left in the foreground a second self-portrait of Trevisani. On the pedestal the coats of arms of Colbert and Arnauld de Pomponne under the crown of a marquis. The coat of arms and crown refer to Jean-Baptiste Colbert, Marquis de Torcy, and his wife, Cathérine-Félicité Arnauld de Pomponne, to whom the painting was given by Cardinal Pietro Ottoboni in 1709.