Anti-Semitism against Jews in Europe increased in the 1100s as Christians blamed them for problems and some church leaders required Jews to wear identifying badges. Many Jews were forced from their lands and took up occupations like money lending. The Crusades beginning in 1095 aimed to retake the Holy Land from Muslim rule but Crusaders also killed many Jews along the way. The Crusades had lasting effects on Europe including strengthening monarchical power and exposing Europeans to new ideas that stimulated economic and cultural revival.