Philadelphia nativist riots

The Philadelphia nativist riots (also known as the Philadelphia Prayer Riots, the Bible Riots and the Native American Riots) were a series of riots that took place on May 6–8 and July 6–7, 1844, in Philadelphia, Pennsylvania, United States and the adjacent districts of Kensington and Southwark. The riots were a result of rising anti-Catholic sentiment at the growing population of Irish Catholic immigrants.

Source: Wikipedia — Philadelphia nativist riots (CC BY-SA 4.0)