 As a coronation sword , Szczerbiec was first specifically mentioned by Jan Długosz in his account of the crowning of King Casimir IV ( r . 1447 – 1492 ) , but it was probably first used in a coronation ceremony by King Vladislaus the Elbow @-@ High ( r . 1288 – 1333 ) in 1320 , by which time he had reunited most of the core territories of Poland . If Szczerbiec had previously belonged to his uncle , Boleslaus I of Masovia , or his father @-@ in @-@ law , Boleslaus the Pious , then he could have inherited it . If it had belonged to any of the two <unk> who had ruled from Kraków as high dukes of all Poland , then Vladislaus could have simply found it in the Wawel Cathedral . Thereafter , Szczerbiec became an integral part of the Polish Crown Jewels , shared their fate , and was the principal ceremonial sword used in coronations of all Polish kings until 1764 , except Vladislaus II Jogaila ( 1386 ) , Stephen Báthory ( 1576 ) , Stanislaus I Leszczyński ( 1705 ) , and Augustus III Wettin ( 1734 ) . 
