Jacob August Riis (May 3, 1849 - May 26, 1914), a Danish-American muckraker journalist, photographer, an social reformer, was born in Ribe, Denmark. He is known for his dedication to using his photographic and journalistic talents to help the less fortunate in New York City, which was the subject of most of his prolific writings and photographic essays. He helped with the implementation of "model tenements" in New York with the help of humanitarian Lawrence Veiller. As one of the first photographers to use flash, he is considered a pioneer in photography.