The cannonball at Stortorget
If you visit Stortorget in the Old Town, you can see a cannonball sitting in the corner of the house where Stortorgskällaren is located today. According to folk legend, the bullet almost hit Kristian II in the head when he was at a window inside the house. It is said to have been fired from Brunkeberg during Gustav Vasa's siege of Stockholm in 1521, the year after the Stockholm bloodbath. The truth is, however, that furniture dealer Grevesmühl had the house rebuilt in 1795 and in connection with this walled in the cannonball in the corner.
Historical Escapes creates unique escape rooms with themes from the history of Stockholm. Read more here about how you can experience the Stockholm Bloodbath in the form of an Escape Room.