What's a "Landler"?

Tonight, on MPR, the host interviewed Phillip Brunelle from VocalEssence about the origins of the song Silent Night.  Brunell said most of us know it was written for the Christmas services at a little Bavarian church whose organ wasn't working cuz mice had chewed the bellows.  So, it was first performed by the choir accompanied by a guitar, and that it was written as a "landler" or walz.  (Ha! I've begged my sisters, for years, to sing it faster, but Nooooo.  I love being right!)

Here's where I first heard of a landler--it's the music we used for the reunion video, called STILLWATER LANDLER .  The clip starts in an interview with Erwin Suess of the Hoolerie Dutchmen.  Notice the tempo?  Now, think "Stille Nacht, Heilige Nacht...."
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Later: LOL, two sisters called and sang Stille Nacht with me in the RIGHT tempo!
Merry Christmas!