▁quot as ▁for ▁sugar , ▁the ▁sugar ▁factory ▁( S ü dz ucker ) ▁was ▁shut ▁down ▁in ▁ 2 0 0 1 . ▁ ▁L ign ite ▁min ing ▁was ▁dis cont in ued ▁in ▁the ▁early ▁ 1 9 9 0 s , ▁the ▁remaining ▁mines ▁are ▁planned ▁to ▁be ▁a ▁system ▁of ▁la kes ▁and ▁he ath land ▁in ▁an ▁arc ▁from ▁the ▁south west ▁to ▁the ▁north . ▁ ▁S ights ▁▁▁ ▁Bar o que ▁castle ▁with ▁L ust g arten ▁( ple asure ▁gard ens ), ▁formerly ▁temporary ▁residence ▁and ▁administrative ▁centre , ▁later ▁d ower ▁of ▁the ▁D uk es ▁of ▁Sax ony - Mer se burg , ▁built ▁on ▁the ▁found ations ▁of ▁a ▁medieval ▁mo ated ▁castle ▁ ▁k enn el ▁gard ens , ▁ter rac ed ▁green ▁space ▁created ▁between ▁the ▁city ▁wall ▁and ▁mo at ▁( re - open ed ▁to ▁visitors ▁in ▁ 2 0 1 0 ) ▁ ▁fort ifications ▁d ating ▁back ▁to ▁the ▁ 1 4 th ▁and ▁ 1 5 th ▁century ▁with ▁two ▁to wers , ▁def ensive ▁wall , ▁and ▁water - filled ▁mo at ▁ ▁rose ▁garden ▁ ▁city ▁church ▁of ▁St . ▁Peter ▁& ▁Paul , ▁brick ▁church ▁of ▁the ▁ 1 5 th ▁century ▁with ▁significant ▁high ▁alt ar ▁ ▁mem orial ▁to ▁Hermann ▁Schul ze - Del itz sch ▁ ▁execution er ' s ▁house ▁( res ident ▁execution er ▁first ▁documented ▁in ▁ 1 6 1 9 ) ▁ ▁Stadt sch