This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Chicago Board of Trade . en Frontisepiece of the book showing the Chicago Board of Trade Building designed by William Boyington History of Chicago From the Earliest Period to the Present Time in Three Volumes Andreas org page Board of Trade Building Chicago PDold
Page 2023 Free-images.com. All images are Public Domain