Khan Academy
Khan Academy: Kathe Kollwitz, in Memoriam Karl Liebknecht
German artist Kathe Kollwitz worked almost exclusively in printmaking and became known for her prints that celebrated the plight of the working-class. View pictures and read about her techniques in this essay.
Other
Nmwa: Artist Profiles: Kathe Kollwitz
An excellent biography with links to several Kollwitz works including a self-portrait.
Other
Art in Context: Kathe Kollwitz
A page of example paintings by Kathe Kollwitz. Click each one for a larger view.