The Detroit Publishing Company, which started in 1896 as Detroit Photographic Company, produced more than 25,000 photographs into the early 20th century. The street view pictured above is archived in the Library of Congress Detroit Publishing Company Collection. Photographs such as this one were the raw material from which the first picture postcards were created. As noted in the web archive’s description, the company “obtained the exclusive rights to use the Swiss ‘Photochrom’ process for converting black-and-white photographs into color images and printing them by photolithography. This process permitted the mass production of color postcards, prints, and albums for sale to the American market.” The same demand for travel mementos created many business opportunities wherever tourists went. In the same year that the Detroit…