This Church the "Great Mother of God" is the Co-Cathedral of Taranto. It was conceived considering the close link with the maritime tradition of Taranto. The façade, in fact, represents a kind of canopy that reflects in the pools of the courtyard to symbolize the sea. These perforated reinforced concrete structures reach 50 meters in height and contain the stairs to the use of the tower hidden in the structures of the wing. The interior has three aisles from the essential character in the coating in white plaster, green and ocher. Even in the decorations, there is the hand of the architect, Gio Ponti in fact to give prepared and the Annunciation painted on canvas, the seats for the dignity of the Chapter and stalls for the rest of the canons. The same baptismal font in the chapel of the same name in the middle of the aisle, was designed by Ponti.