▁ 1 9 8 0 ▁with ▁the ▁first ▁office ▁building ▁All geme ines ▁Ver f üg ungs zent rum ▁( AV Z ▁I ). ▁Since ▁the ▁first ▁building ▁constructed ▁several ▁further ▁buildings ▁followed ▁and ▁increased ▁the ▁university ▁campus , ▁among ▁them : ▁The ▁Eugen - Sch mal en bach - Build ing ▁( AV Z ▁II ), ▁the ▁Philipp - Re is - Build ing , ▁the ▁Centre ▁of ▁Technology ▁and ▁In nov ation ▁( T G Z ), ▁the ▁extension ▁of ▁the ▁University ▁Library , ▁and ▁the ▁new ▁can teen . ▁As ▁more ▁and ▁more ▁university ▁buildings ▁are ▁concentr ated ▁on ▁the ▁Camp us , ▁it ▁has ▁become ▁easier ▁for ▁the ▁academic ▁staff ▁of ▁different ▁academic ▁areas ▁to ▁co oper ate ▁and ▁eng age ▁in ▁cross - dis cipl inary ▁research . ▁ ▁Furthermore , ▁as ▁a ▁distance ▁university , ▁the ▁University ▁of ▁H agen ▁oper ates ▁numerous ▁regional ▁and ▁study ▁cent ers ▁located ▁across ▁Germany ▁and ▁in ▁other ▁European ▁countries , ▁which ▁are ▁an ▁important ▁aspect ▁of ▁the ▁university ' s ▁bl ended ▁learning ▁concept . ▁At ▁these ▁regional ▁and ▁study ▁cent ers , ▁students ▁attend ▁mand atory ▁sem in ars ▁and ▁prepar atory ▁classes ▁for ▁ex ams , ▁study ▁together ▁with ▁other ▁students , ▁borrow ▁books , ▁and ▁find ▁ment ors . ▁Today , ▁the ▁university ▁has ▁more ▁than ▁ 5 0 ▁study ▁cent res ▁within ▁Germany ▁and ▁co oper ates ▁intens ively ▁with ▁several ▁other ▁ren owned ▁institutions , ▁such ▁as ▁Kar ls ru he ▁Institute ▁of ▁Technology ,