In The loop

On the Great Chicago Fire’s 155th anniversary, give the cow story a rest. The National Archives notes that Mrs. O’Leary’s cow was exonerated; the fire’s exact origin remains unknown.

Great Chicago Fire anniversary
When: Thursday, October 8, 2026
History: The National Archives’ account

The blaze began October 8, 1871, and continued until October 10. Ferocious winds, dry conditions and a city full of wood helped it spread. The familiar barnyard explanation makes a catchy story, but uncertainty belongs in the telling.