Designed to serve the needs of the University of Chicago community and its many visiting scholars, the University of Chicago Map Collection contains approximately 420,000 maps, 10,000 air photos, and 2000 books. While only a small fraction of these materials can be found on this site, scholars and members of the general public will be delighted to learn that many maps that document the changes across the city of Chicago are available here. These digitized maps are primarily divided into chronological groupings, including "Chicago in the 1890s" and "Chicago 2000 Census Maps". Here, visitors can view maps of the Columbian Exposition of 1893, a map of the business center of the city from 1905, and a detailed map of the city that shows the land values for each square mile in 1873.