1. Martin Luther may or may not have swung a hammer — regardless of what you've seen in the movies or Sunday School illustrations.
2. No matter.
3. The legendary start of the Protestant Reformation, exactly 500 years ago on Tuesday, Oct. 31, is burned into the historical imagination.
4. That's when Luther — a German Catholic priest, monk and professor — published his famous 95 Theses, possibly by nailing them onto a church door in the provincial city of Wittenberg.