The architect Pier Francesco Silvani choose for it the Baroque style then popular in Rome. The altar has a marble bas-relief depicting the "Glory of St Andrea Corsini", sculpted by Foggini, and above a "God the Father" sculpted by Carlo Marcellini. On the sides of the altar are two more Foggini marble bas-reliefs: one depicts "Sant'Andrea descends girded with sword to lead the Florentines to victory during the Battle of Anghiari" and the other recalls a "Miraculous vision of the Virgin by a young Sant'Andrea" (occurring in the church of the Convent delle Selve).