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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...

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Antiochus VIII Grypos
A silver tetradrachm depicting Antiochus VII Grypos, ruler of the Greek Seleucid Kingdom in 125 BCE. (Numismatics Museum, Athens)

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Slab of Inyotef VIII
This limestone block was part of a Ptolemaic foundation. There are hieroglyphic inscription, including a cartouche of the Egyptian king Intef. In addtion, there are head and one arm of the god Min, who looks to the right side. From Koptos...

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History vs. Henry VIII - Mark Robinson & Alex Gendler
View full lesson: https://ed.ted.com/lessons/history-vs-henry-viii-mark-robinson-and-alex-gendler He was a powerful king whose break with the church of Rome would forever change the course of English history. But was he a charismatic reformer...

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Pope Gregory I
Statue of St. Gregory the Great in the Oratory of St. Barbara on the Caelian Hill, Rome.

Definition
Despotate of Epirus
The Despotate of Epirus was one of the successor states of the Byzantine Empire when it disintegrated following the Fourth Crusade's capture of Constantinople in 1204 CE. It was originally the most successful of those successor states, coming...

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Albigensian Crusade
The Albigensian Crusade (aka Cathars' Crusade, 1209-1229 CE), was the first crusade to specifically target heretic Christians - the Cathars of southern France. Not successful in repressing the heresy, the on-off campaigns over two decades...

Definition
Carolingian Dynasty
The Carolingian Dynasty (751-887) was a family of Frankish nobles who ruled Francia and its successor kingdoms in Western and Central Europe during the Early Middle Ages. The dynasty expanded from Francia as far as modern Italy, Spain, and...

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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
Christianity
Christianity is the world's largest religion, with 2.8 billion adherents. It is categorized as one of the three Abrahamic or monotheistic religions of the Western tradition along with Judaism and Islam. 'Christian' is derived from the Greek...