Know-Nothing Riots in United States politics

The term Know-Nothing Riot has been used to refer to a number of political uprisings of the Know Nothing Party in the United States of the mid-19th century. These anti-immigrant and anti-Catholic protests culminated into riots in Philadelphia in 1844; St. Louis in 1854, Cincinnati and Louisville in 1855; Baltimore in 1856; Washington, D.C., and New York City in 1857; and New Orleans in 1858.