This timeline of anti-Semitism chronicles the facts of anti-Semitism, hostile actions, or discrimination against Jews as a religious or ethnic group. It includes events in the history of anti-Semitic thought, actions taken to combat or relieve the effects of anti-Semitism, and events that affected the prevalence of anti-Semitism in later years. The history of anti-Semitism can be traced from ancient times to the present day. Some authors prefer to use the term anti-Judaism or religious anti-Semitism for religious sentiment against Judaism before the rise of racial anti-Semitism in the nineteenth century.