A man using a metal detector has unearthed a medieval sword that might have served as a weapon during the Battle of Grunwald in 1410. 

Alexander Medvedev discovered the sword near Olsztyn, in northern Poland, alongside the metal remains of a scabbard, or sheath; a belt; and two knives that would have been attached to the belt, the local governmental Marshal’s Office of Warmia and Masuria reported in a translated news release on April 22.