Basilica of Santa Maria in Trastevere
In this place in 38 BC would occur eruption of oil from the ground, perhaps oil, later interpreted as the announcement of the coming of the Messiah. Founded in the third century by Pope Callistus I, the church was renovated under Pope Innocent II to which you must also patrons of the mosaics on the facade and apse.
The Basilica houses the relics of St. Julius I, and the bodies of St. Callistus I and Innocent I.