Santa Maria della Concezione in Campo Marzio is a 17th century former monastic church.
Interior
Santa Maria in Campo Marzio, as the church is better known, is built on a Greek cross plan, with a central dome.
Sanctuary
The sanctuary has a large semi-circular external apse. Over the high altar is an early 13th century icon of the Virgin Mary, which is encircled by a gilded glory.
Apse Vault
The vault of the apse is divided into three sectors by ribs embellished with rosettes in gilded stucco, and these sectors contain frescoes of the Virgin Mary by Placido Costanzi, 1730.
Dome
The interior is dominated by the large oval dome. The cupola is pierced by four oval windows each decorated with stucco fronds and two putti. The oval oculus is encircled by a stucco flower garland.