Page Scans of the APS Reference Collection for the Columbian Exposition Issue.
From the Smithsonian National Postal Museum: The World's Columbian Exposition, also known as 'The White City,' opened on Chicago's lakefront on May 1, 1893. Over the next seven months, twenty-seven million visitors attended the fair. The Columbian Exposition commemoratives keep the fair alive for a small population of stamp collectors. The issue price for the set in 1893 was $16.34; in today's dollars the total face tops $300.00. The stamps are some of the most colorful and intriguing of the entire Classic Period of United States philately.