“Her silent lines penetrate the marrow like a cry of pain; such a cry was never heard among the Greeks and Romans.” Even a description like this, from the dramatist Gerhart Hauptmann, does not fully capture the emotion and empathy that the German artist and printmaker Käthe Kollwitz brought to her work. In an art world still dominated by men, Kollwitz gained notice after W.W. I with her heartrending images of women, the working class, and their preoccupations. A major exhibition featuring self-portraits and diaries alongside poignant images of Kollwitz’s subjects celebrates the influential 20th-century artist. —J.V.