On this day: October 31

POSTED: 10:59 PM Oct 30 2012   UPDATED: 12:00 AM Oct 31 2013

The first All Hallows' Evening is celebrated, Nevada becomes a state, Harry Houdini dies, Mount Rushmore is completed, and the Vatican apologizes to Galileo, all on this day.

OTD October 31 - Martin Luther
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AlterVista/Wikimedia Commons

1517: On the eve of All Saint's Day, Martin Luther posts his 95 theses on the door of the Castle Church in Wittenberg, Germany, arguing that Christians were being falsely told that they could find absolution from sin through the purchase of "indulgences" from the Catholic Church. Luther's actions would spark the Protestant Reformation.

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