 Once the building became an orphanage, the Augustinian nuns put a revolving drum by its entrance which was used as a deposit "box" for unwanted babies.The apse contains the frescoes (1630) by Giovanni da San Giovanni of the four patron martyr saints, Severo, Severiano, Carpoforo e Vittorino.The altarpiece on the left nave of "S.Sebastiano curato da Lucina e Irene" was painted by Giovanni Baglione.