 Szczerbiec is owned by the Wawel Royal Castle National Art Collection ( inventory number 137 ) in Kraków , the former capital city of Poland . As the only preserved of Polish medieval coronation insignia , it is a prominent part of the museum 's Treasury and Armory permanent exhibition . The sword is suspended horizontally inside a glass case in the middle of the Jagiełło and Hedwig Vault located on the ground floor in the northeastern corner of the Wawel Castle . 
