| A | B |
| Martin Luther | monk responsible for beginning Reformation |
| Catholic Church | Medieval Europe's most powerful institution |
| 95 Theses | Luther's complaints against indulgences |
| Protestant Churches | Churches which split from the Catholic Church |
| Henry VIII | Founder of the Anglican Church |
| Counter Reformation | Catholic church's attempt to reform itself |
| Peace of Augsburg | agreement among German princes and Charles V |
| Pluralism | Holding of more than one church office |
| Johann Tetzel | monk who hawked indulgences |
| Erasmus | Humanist who criticized the church |
| indulgence | purchased to gain forgiveness of sin |
| Diet of Worms | 1521 gathering which declared Luther an outlaw |