When Martin Luther (1483-1546), a German monk and religious reformer, nailed his 95 “theses” (or propositions) to the church door in Wittenberg on October 31, 1517, so many people agreed with his ideas that they spread throughout western Europe and touched off a religious revolt known as the Reformation. As a result, many Christians broke their centuries-old connection with the Roman Catholic Church and established independent churches of their own, prime among them being the Lutheran Church. October 31 is observed by most Protestant denominations as Reformation Day. Discuss
Source: The Free Dictionary