| A | B |
| Richard I | sole leader of the Crusades |
| Pope Urban II | called for the First Crusade |
| First Crusade | Only successful Crusade |
| Fourth Crusade | Crusade that destroyed Constantinople |
| Jerusalem | Holy Land of Muslims, Jews, and Christians |
| Turk | Muslim |
| Saladin | Muslim leader who took Jerusalem |
| Crusader States | trading centers in the Middle East |
| Clergy | church officials |
| Secular | Non-church related |
| Black Death | name of the Plague that struck Europe in the 1300's |
| Crusades | the Christian attempts to re-take the holy land |
| usury | process of lending money and collecting interest |