Many of South Michigan Avenue's elegant villas were destroyed in the Great Chicago Fire of 1871. The post-fire South Side of Chicago grew rapidly as all economic classes left the city's center. Many of Chicago's elite families settled along Prairie Avenue. By the 1870s and 1880s, Prairie Avenue was the location of elaborate houses between 16th Street and 22nd Street (now Cermak Road). In 1886, the urban elite, including George Pullman, Marshall Field, Philip Armour and John B. Sherman all owned family homes in this area that created an opulent Prairie Avenue streetscape reminiscent of European city streets; as such, it was widely regarded as the city's most fashionable neighborhood. Businesses, such as the Pullman Company, Armour &amp; Company and D.H. Burnham &amp; Company, with ties to Prairie Avenue had national and international reach and impact. Additional grand homes (including many Queen Anne style architecture in the United States and Richardsonian Romanesque) were located on Prairie between 26th and 30th Streets starting in the mid-1880s. The last mansion, a three-story Georgian Revival residence with 21 rooms, was built in the district at 2126 Prairie Avenue in 1905.