On the morning of the second of May, 1519, Leonardo Da Vinci, unquestionably the greatest of geniuses in the intellectually congested Renaissance, was laid to rest in a churchyard on the castle grounds of Amboise, the fortress/estate of Francis the first, the reigning king of France. Francis, an ardent admirer of Leonardo's artistic and scientific achievements, had invited the Maestro to Amboise where he was to serve as the king's production designer...