Santa Maria dell'Olivo is a modern parish church at Via Rubellia 7, in the suburb of Settecamini which is just north of the Via Tiburtina and east of the Circonvallazione Orientale. The church is in a little park on the Piazza di Santa Maria dell'Olivo.
The parish is administered by the Missionaries of the Holy Family (Missionari della Sacra Famiglia), and the dedication is to the Blessed Virgin Mary under an ancient Roman title of Our Lady of the Olive Tree. Sant'Apollonia in Trastevere probably had this dedication.
The church is a tall neo-Gothic building built in 1923 with a single nave, no aisles and an external semi-circular apse. The fabric is rendered in ochre yellow, with white stone and red brick details.
The entrance façade has a tall gabled red brick porch enclosing the entrance, with an arched portal. Over the door is a tympanum with a relief of the Annunciation, having a slight Gothic point to the arch. Above the porch is a wheel window in stone, with the lights forming a Japanese chrysanthemum with six petals separated by little columns with capitals. There is a row of small pendant brick Gothic arches below the gabled roofline, supported on small stone corbels.
The nave has four bays, and the exterior walls have two storeys separated by a string course. The first storey on each side has the bays separated by brick pilasters, and each bay has one single-light vaguely Gothic window. The second storey has four large recessed arches, with the first bay from the entrance and the third having a triplet of windows, the middle one being taller, and the second and the fourth having only a singleton.
There is a rather impressive detached campanile to the right of the far right hand corner of the church. Its high plinth, in brick painted in a faded ox-blood colour, has a prominently overhanging cornice and eight little pendant arches without corbels on each side. The main storey of the tower has a large round-headed window on two sides, and a clock-face on each side below the bell-chamber. The latter has two more projecting cornices below and above, and an arched sound-hole on each side. The roofline has a row of three decorative brick finials on each side, shaped like a stylized pair of horns.