Crusades
military campaigns taken by European Christians of the eleventh through the fourteenth centuries to take over the Holy Land and convert Muslims and other non-Christians to Christianity
heresies
religious practices or beliefs that do not conform to the traditional church doctrine
Pope Innocent III
frequently persecuted heretics and Jews
called for the fourth crusade
4th Crusade
Crusaders conquered and sacked Constantinople and declared a Latin empire
-called for by Pope Innocent III
Inquisition
Formalized interrogation and persecution of heretics
-set by Pope Gregory IX
Thomas Aquinas
Christian theologian
-wrote Summa Theologica, outlined view that faith and reason are not in conflict, but both are gifts from God and can be used to enhance each other
-writings had major impact on Christian thought
