Danish-born Jacob Riis (1849-1914) was a social reformer and photojournalist. He is best known for his 1890 book How the Other Half Lives, which brought public attention to New York's squalid housing, sweatshops, bars, and alleys. The City Museum holds the complete collection of images that Riis used in his writing and lecturing career, including photographs he made, commissioned, or acquired. These depict men, women, and children of many nationalities at home, work, and leisure. This collection contains vintage prints, glass-plate negatives, and lantern slides, as well as a set of recently produced prints from all of Riis's original negatives.