Isn't this painting fantastic? You can click it to enlarge. It was painted by Holbein the younger and it features his wife and two kids. I find it incredibly sad. I first found it on the cover of Julia Kristeva's Black Sun. It looks like an excellent book though my zero knowledge of Lacan and psychoanalysis in general means that I am not going to understand most of the stuff in it. The painting captures Freud's idea of the loss of "maternal object" resulting in mourning and melancholia very well.
Another famous Holbein painting is the image of the body of dead Christ. Incidentally I first came across it on the cover of the OUP edition of Dostoevsky's The Idiot. And Kristeva's book has chapters on Dostoevsky and Holbein too.