I've been there before and am going this Saturday. It's a great recreation of the battle and 3000 or so knights participate. I will post some pics from it later. If you know any interesting details, post them. Here is one:
The Germans call it the First Battle of Tannenberg. The first, because in 1914 the Germans gained a smashing victory over the Russians there. In 1934, von Hindenburg (Paul Ludwig Hans Anton von Beneckendorff und von Hindenburg) was burried there(?!) and in 1945, when the German army was retreating, they took his remains with them and blew up his mausoleum.
I hear from my participating friends that the battle is going to be fierce, but we are expected to win again.
What happened to the two swords?