There was a good podcast ("Against the Rules") by Michael Lewis about this painting, and the incentives towards certifying it as a Leonardo: https://atrpodcast

There was a good podcast ("Against the Rules") by Michael Lewis about this painting, and the incentives towards certifying it as a Leonardo: https://atrpodcast.com/episodes/the-hand-of-leonardo-s1!7616f https://atrpodcast.com/episodes/the-hand-of-leonardo-s1!7616... edit: fixed link