[ Ссылка ] Leonardo Da Vinci's life and work is well known -- but his own face is not. Illustrator and activist Siegfried Woldhek used some thoughtful image-analysis techniques to find what he believes is the true face of Leonardo. Here, he walks viewers through exactly how he did it.
![](https://i.ytimg.com/vi/7vXsynj1QkQ/mqdefault.jpg)