Workers made a surprising discovery in Poland when they pulled an early medieval sword from a muddy riverbed while dredging, and some researchers think the weapon could have a Viking connection.

The 1,000-year-old sword, which is thought to be older than Poland itself, was found cloaked in silt and in “near perfect” condition in the depths of the Vistula (also spelled Wisła) River, which runs through Włocławek, a city in northern Poland, according to Warsaw Point, a Polish magazine.