religious officials, such as priests, given authority to conduct religious services

the bishop of Rome, later the head of the Roman Catholic Church

belief that differs from or contradicts the accepted teachings of a religion

disease that spreads quickly and kills many people

a medieval military plan,one of a series made by Europeans to recover the Holy Land from the Muslims in the 11th,12th,and 13th centurion

the land a lord granted to a vassal in exchange for military service and loyalty

a noble who held land from and served a higher-ranking lord,and in return was given protection

in the Middle Ages,a noble warrior who fought on horseback

person who travels to carry the ideas of a religion to others

to declare that a person or group no longer belongs to a church