This church is of the tower-façade type, of which there are several in the diocese of Seville. It attracts attention because of its originality, specifically because of the marked contrast between the whiteness of its walls and the decorative stone and brick motifs on the main doorway and other parts of the façade.
The five-storey tower is slender and occupies the middle of the façade above the large doorway. It is built of brick and has decorative stone motifs. Above the semicircular arch there is a double window, on whose sides there are two sculptures of the Virgin Mary and the angel in the scene of the Annunciation. It is she who the church is named after. Despite the simplicity of the sculptures, they have a special appeal precisely because of their naïf style.
On the right side of the doorway, providing light to the baptismal chapel, is the original Renaissance window, which adds a colourful touch of stone to the middle of the white façade. It is a typical 16th century decorative motif. The contrast between the pristine whiteness of the wall and the stone of the doorway and window forms a very original ensemble. This window is one of the most beautiful pieces of architecture in Constantina.