High Quality Content by WIKIPEDIA articles! 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 between May 6 and 8 and July 6 and 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.