The Annunciation (Detail of Virgin) -

The Annunciation (1472-1475) is a painting by Leonardo da Vinci in the Uffizi Gallery in Florence. It depicts the annunciation by the Archangel Gabriel to the Virgin Mary that she will conceive Jesus Christ and is set in the enclosed courtyard garden of a Florentine villa.
The angel holds a Madonna lily, a symbol of Mary's virginity and of the city of Florence. It is supposed that Leonardo originally copied the wings from those of a bird in flight, but they have since been lengthened by a later artist.
When Annunciation came to the Uffizi in 1867 from the monastery of San Bartolomeo of Monteoliveto, near Florence, it was ascribed to Domenico Ghirlandaio, who was, like Leonardo, an apprentice in the workshop of Andrea del Verrocchio. In 1869, some critics recognized it as a youthful work by Leonardo.
Verrocchio used lead-based paint and heavy brush strokes. He left a note for Leonardo to finish the background and the angel. Leonardo used light brush strokes and no lead. When the Annunciation was x-rayed, Verrocchio's work was evident while Leonardo's angel was invisible.
The marble table in front of the Virgin probably quotes the tomb of Piero and Giovanni de' Medici in the Basilica of San Lorenzo, Florence that was sculpted by Verrocchio in this same period.
The background shows a Harbour scene that is believed to be at Rome.