Maps of the 1893 World’s Columbian Exposition fairgrounds offer a fascinating look at the evolving design of the Jackson Park campus and of the continuous changes during the run of the Fair. The Library of Congress holds many interesting specimens of World’s Fair cartography in the collection of the Geography and Map Division. Cynthia Smith’s blog post “Chicago in 1893: Selected Maps of the World’s Columbian Exposition” (December 4, 2024) highlights several maps and exhibit hall floorplans from the Chicago fairgrounds.