In 1937, Picasso expressed his outrage against war with Guernica, his enormous mural-sized painting displayed to millions of visitors at the Paris World’s Fair. It has since become the twentieth century’s most powerful indictment against war, a painting that still feels intensely relevant today. Much of the painting’s emotional power comes from its overwhelming size, approximately eleven feet tall and twenty-five feet wide. Guernica is not a painting you observe with spatial detachment; it feels like it wraps around you, and immerses you in its larger-than-life figures and action.

Source: Khan Academy