▁" the ▁State ▁Piet ism ", ▁as ▁new ▁laws ▁and ▁reg ulations ▁were ▁established ▁in ▁favor ▁of ▁Piet ism . ▁Though ▁Piet ism ▁did ▁not ▁last ▁for ▁a ▁substantial ▁time , ▁numerous ▁new ▁small ▁p iet istic ▁res urre ctions ▁occurred ▁over ▁the ▁next ▁ 2 0 0 ▁years . ▁In ▁the ▁end , ▁Piet ism ▁was ▁never ▁firm ly ▁established ▁as ▁a ▁last ing ▁religious ▁grouping . ▁ ▁Leg acy ▁Although ▁the ▁D ano – N or weg ian ▁union ▁was ▁generally ▁viewed ▁fav ou rab ly ▁in ▁Norway ▁at ▁the ▁time ▁of ▁its ▁dissol ution ▁in ▁ 1 8 1 4 , ▁some ▁ 1 9 th ▁century ▁Norwegian ▁writers ▁dispar aged ▁the ▁union ▁as ▁a ▁" 4 0 0 - year ▁night ." ▁Histor ians ▁describe ▁the ▁idea ▁of ▁a ▁" 4 0 0 - year ▁night " ▁as ▁a ▁myth ▁that ▁was ▁created ▁as ▁a ▁r het or ical ▁device ▁in ▁the ▁struggle ▁against ▁the ▁Swedish – N or weg ian ▁union , ▁inspired ▁by ▁ 1 9 th ▁century ▁national ▁rom antic ist ▁ideas . ▁Since ▁the ▁late ▁ 1 9 th ▁century ▁the ▁Dan ish – N or weg ian ▁union ▁was ▁increasing ly ▁viewed ▁in ▁a ▁more ▁nu anced ▁and ▁fav ou rable ▁light ▁in ▁Norway ▁with ▁a ▁stronger ▁focus ▁on ▁empir ical ▁research , ▁and ▁histor ians ▁have ▁highlight ed ▁that ▁the ▁Norwegian ▁economy ▁th riv ed ▁and ▁that ▁Norway ▁was ▁one ▁of ▁the ▁world ' s ▁wealth iest ▁countries ▁during ▁the ▁entire ▁period ▁of