▁rest itution s ▁in ▁the ▁post - war ▁years ▁major ▁port ions ▁of ▁the ▁lo oted ▁collections ▁remained ▁in ▁the ▁Library . ▁So ▁the ▁earliest ▁possible ▁rest itution ▁of ▁those ▁hold ings ▁to ▁their ▁legit imate ▁possess ors ▁is ▁for ▁the ▁Aust rian ▁National ▁Library ▁not ▁only ▁a ▁duty ▁under ▁law , ▁but ▁also ▁a ▁moral ▁question . ▁With ▁the ▁Federal ▁Law ▁on ▁Rest itution ▁of ▁Art ▁Object s ▁in ▁ 1 9 9 8 , ▁the ▁basis , ▁long ▁since ▁necessary , ▁was ▁created . ▁In ▁December ▁ 2 0 0 3 , ▁after ▁careful ▁exam ination ▁of ▁all ▁relevant ▁hold ings , ▁the ▁Aust rian ▁National ▁Library ▁completed ▁its ▁report ▁on ▁proven ance ▁according ▁to ▁the ▁Law ▁on ▁Rest itution ▁of ▁Art ▁Object s ▁of ▁ 1 9 9 8 , ▁and ▁handed ▁it ▁over ▁to ▁the ▁Commission ▁for ▁Pro ven ance . ▁The ▁essential ▁find ings ▁are ▁lists ▁of ▁illegal ▁ac quis itions ▁during ▁the ▁Naz i ▁period ▁which ▁are ▁still ▁in ▁the ▁possession ▁of ▁the ▁Aust rian ▁National ▁Library . ▁Since ▁then ▁the ▁Aust rian ▁National ▁Library ▁has ▁taken ▁p ains ▁to ▁find ▁the ▁legit imate ▁own ers ▁or ▁inherit ors , ▁so ▁as ▁to ▁give ▁back ▁the ▁objects ▁as ▁quickly ▁as ▁possible . ▁Since ▁December ▁of ▁ 2 0 0 3 ▁a ▁total ▁of ▁ 3 2 , 9 3 7 ▁objects ▁have ▁been ▁restored ▁to ▁their ▁law ful ▁own ers ." ▁ ▁Post - World ▁War ▁II ▁ ▁Ren amed ▁again ▁into ▁the ▁Aust rian ▁National ▁Library