ation ▁and ▁tour ism ▁▁ ▁Since ▁ 1 9 8 2 ▁young ▁people ▁have ▁been ▁involved ▁in ▁the ▁conservation ▁of ▁the ▁Kon rad s burg . ▁From ▁ 1 9 8 4 ▁to ▁ 1 9 8 8 ▁it ▁was ▁supported ▁by ▁students ▁of ▁the ▁Fac ulty ▁of ▁Art ▁Science ▁of ▁the ▁H umb old t ▁University ▁of ▁Berlin . ▁The ▁decl ine ▁of ▁the ▁site ▁was ▁halt ed ▁and ▁part ▁of ▁it ▁was ▁opened ▁to ▁the ▁public . ▁On ▁ 1 ▁June ▁ 1 9 9 0 ▁the ▁initi ative ▁of ▁the ▁Society ▁for ▁the ▁Prom otion ▁of ▁the ▁Kon rad s burg ▁( F ör der kreis ▁Kon rad s burg ) ▁was ▁founded ▁to ▁look ▁after ▁the ▁castle ▁site . ▁In ▁the ▁years ▁that ▁followed , ▁several ▁end anger ed ▁historic ▁buildings ▁in ▁the ▁vic inity ▁were ▁also ▁taken ▁over ▁by ▁the ▁society , ▁renov ated ▁and ▁util ised , ▁for ▁example , ▁the ▁tower ▁wind mill ▁at ▁End orf , ▁the ▁old ▁brick ▁factory ▁at ▁Wies er ode ▁and ▁the ▁for ester ' s ▁house ▁at ▁Friedrich sh ohen berg . ▁In ▁ 1 9 9 4 ▁the ▁society ▁was ▁accepted ▁by ▁UN ES CO ▁into ▁its ▁Tre asures ▁of ▁the ▁World ▁project . ▁Since ▁ 2 0 0 3 ▁the ▁society ▁has ▁run ▁a ▁sheep - f arm ing ▁business ▁at ▁the ▁foot ▁of ▁the ▁castle . ▁The ▁Kon rad s burg ▁is ▁a ▁stop ▁on ▁the ▁Roman es que ▁Road . ▁ ▁The ▁Kon rad s burg