▁Provin cial ▁Archives ▁of ▁Northern ▁J ut land ▁( 1 8 9 0 – 9 1 ) ▁in ▁V ib org , ▁J ut land ▁; ▁the ▁A ar hus ▁Theatre ▁( 1 8 9 8 – 1 9 0 0 ); ▁Mar sel is borg ▁Palace ▁( built ▁ 1 8 9 9 – 1 9 0 2 ▁as ▁a ▁wed ding ▁gift ▁from ▁the ▁people ▁to ▁Crown ▁Prince ▁Christian ▁( l ater ▁Christian ▁X ); ▁the ▁extension ▁to ▁the ▁Ny ▁Car ls berg ▁G ly pt ote k ▁in ▁C open hagen ; ▁and ▁the ▁C open hagen ▁Police ▁Head quarters , ▁C open hagen ▁( 1 9 1 8 – 1 9 2 2 ). ▁ ▁K amp mann ▁was ▁initially ▁one ▁of ▁the ▁leading ▁Dan ish ▁pro ponents ▁of ▁National ▁Rom antic ▁style . ▁However , ▁during ▁the ▁ 1 9 2 0 s ▁he ▁adopted ▁the ▁Nord ic ▁Classic ism ▁style , ▁becoming ▁one ▁of ▁its ▁main ▁initi ators . ▁One ▁of ▁his ▁more ▁notable ▁works ▁is ▁one ▁of ▁the ▁cul min ations ▁of ▁the ▁style , ▁the ▁Police ▁Head quarters ▁in ▁C open hagen ▁( 1 9 1 8 – 2 2 ) ▁( in ▁a ▁team ▁with ▁A age ▁Raf n , ▁Hol ger ▁Jacob sen ▁and ▁F . ▁Fred ri ks en ) ▁was ▁among ▁the ▁initi ators ▁of ▁ 1 9 2 0 s ▁Nord ic ▁Classic ism . ▁This ▁last ▁building ▁was ▁completed ▁after ▁his ▁death ▁in ▁summer ▁ 1 9 2 0