His Madonna Litta is the only painting of his in Russia, while his portrait of Ginevra de' Benci is the only painting of his in America.  
Among his early drawings, he shows a fascination with the necks of old people.  His Madonna Litta is the only painting of his in Russia, while his portrait of Ginevra de' Benci is the only painting of his in America.  Most of his paintings date from the fifteen years after he left the workshop of Andrea del Verrocchio to settle in Milan.  The lone exception is his Madonna of the Rocks.  FTP, name this painter, draftsman, sculptor, architect, and engineer perhaps best known for his Last Supper and portrait of Mona Lisa.
Among his early drawings, he shows a fascination with the necks of old people.  
Leonardo da Vinci (accept either name)