The nave has an extensive stucco decoration.
The counterfacade was painted (1571-1618) by Teodoro d'Errico (the Italian name for Flemish painter Dirck Hendricksz): it contains a painting of the Angel of Annunciation, on right and a Madonna of the Annunciation, on the left.

The paintings of the side altars are:
St Anne, first altar on right, by Giuseppe Simonelli
St Francis of Assisi, second altar on right by Nicola Malinconico
St Nicola di Bari, third altar on right, Malinconico
St Carlo Borromeo, first altar on left, Malinconico
St Francesco di Paola, second altar on left, Malinconico
St Celestine V and Anthony of Padua, third altar on left by Giuseppe Simonelli
Both Simonelli and Malinconico were students of Luca Giordano.
The main altarpiece is a canvas depicting the Ransom of Slaves (1672),  by Giacomo Farelli, which depicts the Virgin with the child between whose arms above a group of slaves awaits redemption by the arrival of a boat.
The main altar was restored by Sanfelice and Lorenzo Fontana.
The putti there were sculpted by Domenico Antonio Vaccaro.
The nave has an extensive stucco decoration. The counterfacade was painted (1571-1618) by Teodoro d'Errico (the Italian name for Flemish painter Dirck Hendricksz): it contains a painting of the Angel of Annunciation, on right and a Madonna of the Annunciation, on the left.
The paintings of the side altars are:
St Anne, first altar on right, by Giuseppe Simonelli
St Francis of Assisi, second altar on right by Nicola Malinconico
St Nicola di Bari, third altar on right, Malinconico
St Carlo Borromeo, first altar on left, Malinconico
St Francesco di Paola, second altar on left, Malinconico
St Celestine V and Anthony of Padua, third altar on left by Giuseppe Simonelli
Both Simonelli and Malinconico were students of Luca Giordano. The main altarpiece is a canvas depicting the Ransom of Slaves (1672),  by Giacomo Farelli, which depicts the Virgin with the child between whose arms above a group of slaves awaits redemption by the arrival of a boat. The main altar was restored by Sanfelice and Lorenzo Fontana. The putti there were sculpted by Domenico Antonio Vaccaro.
Santa Maria della Mercede e Sant'Alfonso Maria de' Liguori