The words Ave gratia plena Dominus tecum (Greetings most favored one! The Lord is with you) from Luke 1:8 flow from the archangel Gabriel's mouth as he announces the conception of Christ to the Virgin Mary. Much as in modern comic books, Tommaso del Mazza visualized Gabriel's speech for the viewer to follow along. In Mary's lap the Bible is opened to the prophecy of Isaiah: "Behold a virgin shall conceive and bear a son..." (Isaiah 7:14). Gently touching her chest, Mary leans forward to acknowledge her destiny. Above, God the Father floats in a mandorla of angels as the dove of the Holy Spirit descends to Mary at the moment of Incarnation.
The Annunciation takes place in a spatially ambiguous structure in which Mary appears too large. Tooled haloes, gold, and vivid colors heighten the intensity of the moment and add to the overall impression of sumptuousness.
This panel was created by Tommaso del Mazza, until recently known only as the Master of St. Verdiana, who worked in the late Gothic style during the Renaissance in Florence.