▁of ▁the ▁Swedish ▁Empire . ▁From ▁ 1 6 9 5 ▁to ▁ 1 6 9 7 , ▁mayor ▁Johannes ▁Fl itt ner ▁cru elly ▁purs ued ▁alleg ed ▁w itch es ; ▁at ▁least ▁seven ▁were ▁executed . ▁In ▁ 1 7 9 7 , ▁a ▁large ▁fire ▁destroyed ▁almost ▁the ▁entire ▁town . ▁In ▁ 1 8 0 0 , ▁Swedish ▁king ▁Gustav ▁IV ▁Ad olph ▁visited ▁Gr im men ▁and ▁res ided ▁in ▁the ▁so - called ▁king ' s ▁house . ▁Following ▁the ▁Congress ▁of ▁Vienna ▁in ▁ 1 8 1 5 , ▁Swedish ▁P omer ania ▁with ▁Gr im men ▁became ▁part ▁of ▁the ▁Pr uss ian ▁Province ▁of ▁P omer ania . ▁An ▁administrative ▁reform ▁of ▁ 1 8 1 6 ▁made ▁the ▁town ▁capital ▁of ▁a ▁Kreis . ▁In ▁ 1 8 5 3 , ▁ch ol era ▁broke ▁out . ▁ ▁At ▁the ▁end ▁Second ▁World ▁War , ▁Gr im men ▁surrender ed ▁to ▁the ▁Red ▁Army ▁without ▁fighting ▁in ▁April ▁ 1 9 4 5 . ▁In ▁the ▁ 1 9 6 0 s , ▁numerous ▁new ▁fact ories ▁and ▁agricult ural ▁enter pr ises ▁were ▁set ▁up , ▁resulting ▁in ▁prosper ity ▁and ▁physical ▁growth ▁of ▁the ▁city . ▁After ▁East ▁Germany ' s ▁Commun ist ▁regime ▁col lapsed ▁following ▁Die ▁W ende ▁movement ▁of ▁ 1 9 8 9 , ▁the ▁town ' s ▁old ▁buildings ▁were ▁re construct ed . ▁After ▁a ▁re organ ization ▁of ▁the ▁Kreis ▁districts ▁in ▁