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a Portrait of Pope Innocent III (thirteenth century fresco), Monastery... | Download Scientific Diagram
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Pope Gregory I (540 — March 12, 604), Italian pope | World Biographical Encyclopedia
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Death of Pope Gregory the Great | History Today
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Gregory XIII (Pope) - On This Day
In the 13th century, Pope Gregory IX, pope from 1227-1241, believed that cats actually carried
It's Leap Year, & Here's Why! February 24, 1582: Pope Gregory XIII Issues the Proclamation, Inter Gravissimas, & A Commentary by Fr. Richard Kunst – Papal Artifacts
The Tomb of Pope Gregory XIII - Inside The Vatican Pilgrimages
Pope Gregory XIII - Simple English Wikipedia, the free encyclopedia
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Pope Gregory XIII: Accomplishments & Legacy | Study.com
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Top 100 Global Creator - P93. Pope Gregory XIII: Creator of Gregorian calendar - WCSA.WORLD
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Pope Gregory XIII: Accomplishments & Legacy | Study.com
