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John Barbee (September 16, 1815 – December 22, 1888) was the tenth Mayor of Louisville, Kentucky from 1855 to 1857 and chiefly remembered for his part in the anti-immigrant riots known as "Bloody Monday".
He was born in Pewee Valley, Kentucky, and, after his parents died, moved to Louisville at age 14. In 1841, he was elected by the city council as a collector of revenues, and after a brief foray back into the private sector, he was elected to the city council in 1849 and 1851. In 1855, as a member of the anti-Catholic, anti-foreigner Know Nothing party, he was elected Mayor over James S. Speed, who did not run for re-election, believing the election was invalid, but his appeal was denied eventually by the Kentucky Supreme Court.
The most notable event of his term was "Bloody Monday", an uprising against (mostly Catholic) German and Irish immigrants on August 6, 1855. The day was election day, and despite the likelihood of riots, Barbee would not provide any security at voting booths. Know-Nothings prevented naturalized German and Irish from voting, and riots erupted on the streets of the Butchertown district of Louisville. Germans were beaten and some were killed as the riots spilled into the Irish-dominated Eighth Ward, burning a large row of houses (Quinn's Row). Barbee finally intervened to prevent rioters from destroying the city's Catholic cathedral. Officially, 22 people were killed in the riots, although some sources place the number of deaths at 100 or more. 
- Corfield, Justin (2010). Danver, Steven L. (ed.). Revolts, Protests, Demonstrations, and Rebellions in American History: An Encyclopedia [3 volumes]: An Encyclopedia. ABC-CLIO. p. 377. ISBN 9781598842227.
- Yater, George H. (1987). Two Hundred Years at the Fall of the Ohio: A History of Louisville and Jefferson County (2nd ed.). Louisville, KY: Filson Club, Incorporated. ISBN 0-9601072-3-1.
James S. Speed
| Mayor of Louisville, Kentucky
William S. Pilcher