' ▁War , ▁known ▁in ▁Germany ▁as ▁the ▁War ▁of ▁the ▁Pal at ine ▁Su cc ession ▁( P f äl z ischer ▁Er bf ol ge krie g ). ▁ ▁The ▁castle ▁was ▁used ▁until ▁ 1 8 3 3 ▁when ▁the ▁family ▁of ▁Bo os ▁von ▁Wal deck ▁sold ▁its ▁hold ings ▁in ▁the ▁Rh in eland . ▁ ▁Historical ▁background ▁The ▁first ▁document ary ▁mention ▁of ▁a ▁castle ▁in ▁the ▁vic inity ▁of ▁today ' s ▁ru ins ▁dates ▁to ▁the ▁year ▁ 1 2 4 3 . ▁In ▁that ▁document , ▁the ▁kn ights ▁– ▁Her i bert , ▁U do ▁( R ud olf ) ▁and ▁Win and ▁( s urn ames ▁Bo os ▁von ▁Wal deck , ▁Bo ose ▁of ▁Wal the c ce ) ▁– ▁gave ▁their ▁castle ▁Elect or ▁of ▁C ologne , ▁Kon rad ▁von ▁Hoch staden , ▁who ▁in ▁turn ▁en fe off ed ▁them . ▁ ▁Ar ound ▁ 1 2 5 0 , ▁Rudolf ▁( U do ) ▁Bo os ▁von ▁Wal deck ▁built ▁the ▁lower ▁ba iley ▁and ▁both ▁w ards ▁are ▁mentioned ▁in ▁a ▁document ▁in ▁ 1 2 8 5 . ▁ ▁The ▁arch bishop ▁author ized ▁the ▁family ▁to ▁act ▁as ▁land l ords ▁of ▁the ▁area , ▁through ▁commercial ▁contract s ▁with ▁C ologne , ▁thus ▁establish ing ▁the ▁arist ocr atic ▁line ▁of ▁the ▁family ▁that ▁end ured ▁until ▁ 1 8 3 3 . ▁This ▁main ▁seat ▁would ▁be ▁the ▁central ▁administration ▁of ▁mill