 It is plausible , though , that Boleslaus did chip his sword by striking it against an earlier gate in Kiev . His great @-@ grandson , Boleslaus the Bold ( r . 1058 – 1079 ) , hit the Golden Gate with a sword in 1069 , which would indicate that it was a customary gesture of gaining control over a city . It is also possible that this sword was preserved as a souvenir of past victories venerated by Boleslaus the Brave 's successors . According to Wincenty Kadłubek 's Chronicle , Boleslaus <unk> ( r . 1107 – 1138 ) had a favorite sword he called <unk> or Grus ( " Crane " ) . A scribe who copied the chronicle in 1450 added the word <unk> above the word <unk> , but whether these two swords were one and the same is uncertain . 
