▁still ▁exists ▁at ▁Ned re ▁S lot ts gate ▁ 1 . ▁ ▁The ▁building ▁fell ▁into ▁decay ▁and ▁by ▁ 1 7 3 3 ▁a ▁building ▁at ▁R å dh us g aten ▁ 7 ▁was ▁selected ▁to ▁be ▁a ▁new ▁City ▁Hall . ▁ ▁By ▁the ▁ 1 8 0 0 s ▁the ▁building ▁was ▁too ▁small ▁and ▁the ▁growing ▁administration ▁moved ▁to ▁various ▁prem ises ▁across ▁the ▁city . ▁ ▁Arch itect ural ▁compet itions ▁were ▁held ▁in ▁ 1 8 7 6 ▁and ▁ 1 8 9 8 ▁for ▁a ▁new ▁building ▁at ▁Hamm ers borg , ▁but ▁the ▁plans ▁were ▁never ▁carried ▁out ▁due ▁to ▁a ▁lack ▁of ▁funds . ▁ ▁Modern - day ▁City ▁Hall ▁ ▁History ▁The ▁idea ▁of ▁building ▁a ▁new ▁city ▁hall ▁in ▁Pi per via ▁was ▁first ▁suggested ▁by ▁Oscar ▁Hoff ▁( an ▁architect ) ▁in ▁ 1 9 0 6 , ▁but ▁nothing ▁came ▁of ▁the ▁plans . ▁In ▁ 1 9 1 5 , ▁the ▁idea ▁was ▁taken ▁up ▁by ▁Hier onym us ▁Hey erd ahl , ▁who ▁had ▁just ▁stood ▁down ▁as ▁mayor . ▁ ▁He ▁noticed ▁the ▁city ' s ▁lack ▁of ▁a ▁representative ▁city ▁hall ▁to ▁receive ▁the ▁municipality ' s ▁guests ▁during ▁the ▁ 1 9 1 4 ▁J ub ile e ▁Ex hib ition ▁in ▁F rog ner . ▁ ▁He ▁set ▁up ▁an ▁architect ural ▁competition ▁which ▁received ▁a ▁total ▁of ▁ 4 4 ▁entries ▁in ▁the ▁first ▁of ▁two ▁r ounds . ▁ ▁In