alt Hacker NewsStockholm also has famous canon balls lodged on buildings in the old town: https://www.atlasobscura.com/places/stortorget-cannonball
They are supposed to be from the Blood Bath that happened there in the 16th century when Swedes and Danes still enjoyed killing each other frequently, but no wall survives this long with a metal ball in it, hence that’s apparently a fake thing by some smart 18th century building owners.
Yeah nobody who's ever seen a ballistic object hit anything is going to mistake that first image for a cannonball that was actually fired at the wall.