American Party

One of the most famous incidents of anti-Catholic sentiment expression occurred August 11, 1834; non-Catholic rioters looted and burned the Ursuline Convent of Mount Benedict in Charlestown, MA. Anti-Catholic violence also erupted in Philadelphia when 13 people were killed in riots in 1835. Activities by the American Nativist Party in Kensington, Pennsylvania, in 1844 also sparked anti-Catholic riots. In the 1850s, the American Party, also known as the Know-Nothing Party, was partly founded on an anti-Catholic platform.

From the description of Anti-Catholic documents collection, 1844-1930. (Boston College). WorldCat record id: 232957797

...