Arminius purportedly defended the freedom of German tribes and defeated the Romans at the Battle of the Teutoburg Forest in 9 AD. In gratitude they erected an Irmensauele, or pole of Arminius.
A tradition of erecting and worshipping a pole is alluded to in numerous legends and saga and has a wide geographic distribution. The opening paragraph of Grimm’s Saga No. 518 is a reference to this tradition:
“Now it happened that the Kaiser’s bailiff named Grissler rode out to Uri. And when he had lived there some time he erected a pole under the linden tree and everyone had to pass by it. On this pole he placed a hat and ordered a farmhand to sit there and keep watch. He ordered the following public proclamation: Whoever passes must bow to the hat as if the master himself stood there.”