The Oratory of the Purgatory Souls is located in the historic Santa Barbara Square. It was built in the years 1724-1728, as shown by some historical documents, to house the Confraternity of the Purgatory Souls, affiliated with the Archconfraternity of the “Beata Maria del Suffragio” (officiating in Rome in the church of Santa Maria in via Lata), which, anteriorly, almost certainly held its services in the Chapel of the Purgatory Souls in the nearby church of Santa Barbara.
Inside, a marble balustrade distinguishes the apsidal space from the space in front. An oil-on-canvas painting attributed to Neapolitan painter Domenico Tonelli from the second half of the 18th century is inserted in the center of the altar. The altar features a rare wooden Eucharistic trunk, and the side niches house polychrome wooden statues of Christ at the Pillar and that of the Redeemer.
