Annunciation is a painting produced between 1472 and 1475 by Italian artist Leonardo da Vinci.
The composition, the Archangel Gabriel and the landscapes are certain aspects of Annunciation which are pure da Vinci work but it is a fact that some details of the painting such as wings of the angel should have been repainted by another hand and the marble sarcophagus by Andrea del Verrocchio. He was Leonardo da Vinci’s master. It is known that the work is a collaboration of several artists with finishing touches of the painting completed by Leonardo only.
Leonardo’s master used lead-based paint and heavy brush strokes. He also left a note for da Vinci to finish the background and the angel on the painting. Leonardo used light brush strokes only and no lead. Researchers came to a conclusion that when the Annunciation was x-rayed, Verrocchio’s work was evident (visible to them) while Leonardo’s angel was invisible.