[4] The former oratory of the Association rose in Via dei Cosmati; a second one, used between 1896 and 1914, was located in Lungotevere Prati, into a ground that the founder had bought in order to build a bigger church, whose foundation stone was blessed in 1894 by Joseph-Jean-Louis Robert, Bishop of Marseille.

[14] The façade ends aloft with a thin octagonal bell tower: it is surmounted by a cross that hosts an earth-shaped ex-voto, donated by Victor Jouët.

[17] The interior of the church, slightly rotated in respect with the axis of the façade,[18] has three naves with six bays each, covered with a groin vault and divided by pointed arches which rest on polystyle pillars with carved capitals; the pillars and the ribs of the vaults are decorated with stripes of gray stone and red bricks, while the floor shows inserts of red Verona marble.

[27] Both side naves end with a polygonal chapel, which contains a marble altar whose slab rests on little columns and closed by a balustrade decorated with trilobate arches.

[28] The chapel on the opposite side is dedicated to Our Lady of the Rosary and the altar is surmounted by the altar piece by Francesco Notari Our Lady of the Rosary between angels, St. Dominic of Guzmán and St. Catherine of Siena; the frame is decorated with God the Father (in the middle) and the Annunciation (on both sides), while the painted predella shows on the left St. Zita, St. Agnes and St. Cecilia, on the right St. Alphonsus Maria de' Liguori, St. Bernardino of Siena and St. Cyril of Alexandria; the tabernacle is decorated with the Sacred Heart of Jesus.

[32] Close to the counter-façade, above a wooden cantoria whose bulwark is decorated with a series of ogival arches, rises the pipe organ, built by Fabbrica Organi Ruffatti after 1960+ in place of a former one, coming from the church of Santa Brigida.

[33] Next to the church, within the sacristy, is the Museo delle anime del Purgatorio ("Museum of the Souls of Purgatory"), whose entry is a door in the sixth span of the nave on the right.