2 ▁en ▁ 4 ▁( dates ▁from ▁ 1 8 9 8 ); ▁Mor sche ho ef ▁ 1 6 ▁( 1 8 th - century ); ▁Mor sche ho ef ▁ 1 9 ▁( 1 9 th - century ); ▁and ▁Voor bol st ▁ 5 ▁( 1 8 th - century ). ▁ ▁The ▁M ills ▁of ▁Er p ▁ ▁Er p ▁had ▁several ▁mill s ▁throughout ▁the ▁centuries , ▁but ▁all ▁disappeared ▁before ▁the ▁ 1 9 6 0 s . ▁▁ ▁The ▁oldest ▁wind mill , ▁a ▁tower ▁mill ▁at ▁the ▁Wat erm olen weg , ▁was ▁heavily ▁dam aged ▁in ▁a ▁storm ▁in ▁ 1 9 4 9 ▁and ▁subsequently ▁demol ished ▁five ▁years ▁later . ▁It ▁was ▁built ▁in ▁ 1 8 4 9 ▁to ▁replace ▁a ▁post ▁mill ▁that ▁was ▁already ▁mentioned ▁in ▁documents ▁in ▁ 1 5 4 0 ▁and ▁served ▁to ▁complement ▁the ▁wat erm ill ▁on ▁the ▁river ▁A a . ▁The ▁wat erm ill ▁was ▁demol ished ▁in ▁ 1 8 9 7 . ▁ ▁The ▁wind mill ▁at ▁the ▁Mol enti end ▁was ▁built ▁in ▁ 1 8 6 6 . ▁This ▁sm ock ▁mill ▁was ▁demol ished ▁in ▁ 1 9 5 4 , ▁but ▁the ▁mill er ' s ▁house ▁still ▁remains . ▁ ▁A ▁stone ▁sm ock ▁mill , ▁called ▁“ De ▁N ij ver heid ,” ▁was ▁built ▁in ▁ 1 8 9 8 ▁at ▁the ▁Cru ij gen stra at . ▁Even ▁though ▁the ▁mill ▁was