The Battle of Stångebro was fought between King Sigismund and Duke Charles. On September, 25th 1598 Sigismund got trapped in an unfavourable position and had to agree to a truce with Charles. One of Charles' conditions for the truce was the handing over of Swedish privy counsellors from Sigismund's camp. Sigismund complied.
The victor of the battle, Duke Charles, set up a court in March 1600 to try his prisoners. The court, headed by Axel Leijonhufvud and Erik Brahe, consisted of 155 members, with Charles himself being the prosecutor.
Over the years there has been discussions about were the executions actually took place. Today's consensus is that the place is probably in front of the former town hall, in the square's northeast corner. The town hall's location is marked in the paving on the square.
Be very cautious when logging this one, the square is often full of muggles. As always, place the cache exactly as found.