In 1893, a 19-year-old mathematics student, called Carl Størmer, took up a rather unusual hobby. He started walking around the streets of Norway's Oslo, taking pictures of everyday life by means of a secret camera hidden in his clothing. These photos are now considered to be of great historical importance, since they depict the people of nineteenth-century Oslo as they really were, and they differ greatly from the serious posing trends that dominated photography at that time.
Below, you can see a picture of Størmer and his unique device, as well as some of his greatest shots:
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