Descartes and Queen Christina

A famous picture of Pierre-Louis Dumesnil (1698-1781) repainted by Nils Forsberg in 1884 shows Descartes teaching geometry and Astronomy to Queen Christina of Sweden (1626-1689). He had to teach three times a week at 5AM. Being used to rise at 11am before, it was not long until he caught pneumonia and died in 1650. Here is a detail Here is the original lithography and here are (rather bad) adaptations one can find: