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Saint Cyril
Saint Cyril (aka Kyrillos and Constantine the Philosopher, d. 867 CE) was a Byzantine linguist, teacher, scholar and missionary who famously preached Christianity to the Slavs in Moravia with his brother Methodius during the 9th century CE...

Definition
Johann Tetzel
Johann Tetzel (l.c. 1465-1519) was a Dominican Friar who became famous as one of the most effective indulgence salesmen and who inadvertently inspired the Protestant Reformation when Martin Luther (l. 1483-1546) wrote his 95 Theses protesting...

Definition
Thomas Becket
Thomas Becket (aka Thomas á Becket) was chancellor to Henry II of England (r. 1154-1189) and then archbishop of Canterbury (1162 to 1170). Thomas repeatedly clashed with his sovereign over the relationship between the Crown and Church, particularly...

Definition
Anne Boleyn
Anne Boleyn (c. 1501-1536) was the second wife of Henry VIII of England (r. 1509-1547). Anne, sometimes known as 'Anne of a Thousand Days' in reference to her short reign as queen, was accused of adultery and executed in the Tower of London...

Definition
Fifth Crusade
The Fifth Crusade (1217-1221 CE) was called by Pope Innocent III (r. 1198-1216 CE) with the objective, like previous crusades, of recapturing Jerusalem from Muslim control; only this time the strategy was to weaken the enemy by first attacking...

Definition
Catherine de' Medici
Catherine de' Medici (l. 1519-1589) was the queen of France, mother of three kings and two queens and, between 1559 and c. 1576, the most powerful woman in France and, possibly, all of Europe. She was the strength behind the French throne...

Article
The Arch of Constantine, Rome
The Arch of Constantine I, erected in c. 315 CE, stands in Rome and commemorates Roman Emperor Constantine's victory over the Roman tyrant Maxentius on 28th October 312 CE at the battle of Milvian Bridge in Rome. It is the largest surviving...

Article
Medieval Indulgence & Martin Luther
The medieval indulgence was a writ offered by the Church, for money, guaranteeing the remission of sin, and its abuse was the spark that inspired Martin Luther's 95 Theses. Luther (l. 1483-1546) claimed the sale of indulgences was unbiblical...

Definition
Protestant Reformation
The Protestant Reformation (1517-1648) refers to the widespread religious, cultural, and social upheaval of 16th-century Europe that broke the hold of the medieval Church, allowing for the development of personal interpretations of the Christian...

Definition
Council of Trent
The Council of Trent (1545-1563) was a meeting of Catholic clerics convened by Pope Paul III (served 1534-1549) in response to the Protestant Reformation. In three separate sessions, the council reaffirmed the authority of the Catholic Church...