organ ized . ▁Under ▁cust od ian ▁Paul ▁Str att mann , ▁the ▁library ▁received ▁a ▁program ▁for ▁the ▁first ▁time ▁which ▁described ▁its ▁order ; ▁the ▁library ▁gained ▁a ▁three - way ▁view point : ▁ ▁it ▁was ▁the ▁library ▁for ▁the ▁formed ▁Cl asse ▁of ▁the ▁capital ▁who ▁required ▁instruction , ▁ ▁it ▁was ▁the ▁national ▁library ▁of ▁the ▁Aust rian ▁Kaiser th um ▁( emp ire ), ▁where ▁visitors ▁expected ▁to ▁find ▁literary ▁r ar ities , ▁and , ▁ ▁it ▁was ▁the ▁library ▁of ▁the ▁Hof burg , ▁from ▁which ▁it ▁takes ▁its ▁name . ▁ ▁The ▁collection ▁politics ▁of ▁the ▁Imperial ▁Library ▁separated ▁at ▁the ▁beginning ▁the ▁ 1 9 th ▁century ▁appreci ably ▁due ▁to ▁the ▁requirements ▁of ▁the ▁representation ▁and ▁its ▁attention ▁to ▁scientific ▁works . ▁The ▁mult in ational ▁condition ▁of ▁the ▁Aust rian ▁Empire ▁brought ▁with ▁itself ▁that , ▁not ▁only ▁German - language ▁books ▁were ▁collected , ▁but ▁also ▁books ▁of ▁the ▁S lav ic ▁and ▁Hung arian ▁lingu istic ▁area . ▁Sub st ant ial ▁parts ▁of ▁the ▁Hung arian ▁collection ▁moved ▁to ▁Budapest , ▁however , ▁after ▁recon c ili ation ▁with ▁Hung ary . ▁During ▁the ▁March ▁revolution ▁of ▁ 1 8 4 8 , ▁the ▁Imperial ▁Library ▁was ▁in ▁extreme ▁danger , ▁when ▁after ▁the ▁bomb ard ment ▁of ▁Vienna ▁caused ▁the ▁burning ▁of ▁the ▁Hof burg , ▁in ▁which ▁the ▁Imperial ▁Library ▁was ▁located . ▁ ▁An ▁important ▁addition ▁to ▁the ▁Imperial ▁Library ▁is ▁the ▁pap yrus ▁collection