October 4, 1582 – The Gregorian Calendar is introduced by Pope Gregory XIII.
Pope Gregory Xiii Calendar Reform 1582 Photograph by Photo Researchers | Pixels
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Gregory XIII | pope | Britannica
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Gregory XIII (Pope) - On This Day
Pope gregory xiii - Worldkings - World Records Union
:format(jpeg)/cdn.vox-cdn.com/uploads/chorus_image/image/51177367/GettyImages-56215179.0.jpg "We've been using the Gregorian calendar for 434 years. It's still bizarre. - Vox")
We've been using the Gregorian calendar for 434 years. It's still bizarre. - Vox
Gregorian Calendar Pope Gregory XIII. - ppt video online download
Today in History, February 24, 1582: Pope Gregory XIII outlined Gregorian calendar
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On this day in 1582: Pope Gregory XIII announces the new Gregorian calendar
My Catholic Faith - 😇Pope Gregory XIII 👉Pope Gregory XIII (Latin: Gregorius XIII; 7 January 1502 – 10 April 1585), born Ugo Boncompagni, was head of the Catholic Church and ruler of
