San Gregorio Armeno in Naples was built in the 16th century over the remains of a Roman temple dedicated to Ceres, by a group of nuns escaping from the Byzantine Empire with the relics of St. Gregory, bishop of Armenia.

The interior has a single nave with five side arcades: the decoration, with the exception of the five chapels, was finished by Luca Giordano (also author of the Saints over the windows of the dome) in 1679.

The ceiling cassettoni or framed canvases depict the Life of the St Gregorio Armeno and were commissioned by the abbess Beatrice Carafa from the Flemish Teodoro d'Errico.

On the right, the altarpieces include an Annunciation of Mary by Pacecco De Rosa, a Virgin of the Rosary by Nicola Malinconico, and frescoes by Francesco Di Maria.

In the centre is a marble fountain, decorated with dolphins and other marine creatures, with the statues of "Christ and the Samaritan Woman", by Matteo Bottiglieri.