▁metal ▁and ▁thr ash ▁metal ▁bands : ▁Accept , ▁Angel ▁D ust , ▁Bl ind ▁Guardian , ▁D oro ▁( former ly ▁of ▁War lock ), ▁Gra ve ▁D igger , ▁Holy ▁Mos es , ▁Kre ator , ▁R age , ▁Scanner ▁and ▁S od om . ▁Also , ▁North ▁Rh ine - West phal ia ▁is ▁home ▁to ▁Kraft werk , ▁originally ▁a ▁Kra ut rock ▁band ▁for ▁four ▁years , ▁then ▁later ▁a ▁synth - pop ▁band . ▁ ▁Econom y ▁ ▁In ▁the ▁ 1 9 5 0 s ▁and ▁ 1 9 6 0 s , ▁West phal ia ▁was ▁known ▁as ▁Land ▁von ▁Koh le ▁und ▁St ahl ▁or ▁the ▁land ▁of ▁coal ▁and ▁steel . ▁In ▁the ▁post - World ▁War ▁II ▁recovery , ▁the ▁Ru hr ▁was ▁one ▁of ▁the ▁most ▁important ▁industrial ▁regions ▁in ▁Europe , ▁and ▁contributed ▁to ▁the ▁German ▁Wirtschaft sw under . ▁As ▁of ▁the ▁late ▁ 1 9 6 0 s , ▁repeated ▁cr ises ▁led ▁to ▁contra ctions ▁of ▁these ▁industrial ▁branches . ▁On ▁the ▁other ▁hand , ▁producing ▁se ctors , ▁particularly ▁in ▁mechanical ▁engineering ▁and ▁metal ▁and ▁iron ▁working ▁industry , ▁experienced ▁substantial ▁growth . ▁Despite ▁this ▁struct ural ▁change ▁and ▁an ▁economic ▁growth ▁which ▁was ▁under ▁national ▁average , ▁the ▁ 2 0 1 8 ▁G DP ▁of ▁ 7 0 5 ▁billion ▁euro ▁( 1 / 4 ▁of ▁the ▁total ▁German ▁G DP ) ▁made ▁NR W ▁the ▁econom ically ▁strong est ▁state ▁of ▁Germany ,