▁grant . ▁The ▁two ▁b ish ops ▁felt ▁such ▁a ▁sum ▁was ▁beyond ▁their ▁means ▁and ▁sought ▁a ▁comprom ise . ▁Instead ▁it ▁was ▁agreed ▁that ▁G und ulf ▁would ▁build ▁a ▁new ▁stone ▁castle ▁at ▁Ro chester . ▁Initial ly ▁the ▁two ▁b ish ops ▁were ▁concerned ▁that ▁the ▁cost ▁would ▁exceed ▁the ▁king ' s ▁original ▁request ▁and ▁that ▁they ▁would ▁be ▁responsible ▁for ▁the ▁castle ' s ▁up keep . ▁Henry , ▁Earl ▁of ▁War wick ▁convinced ▁them ▁that ▁a ▁castle ▁suitable ▁for ▁the ▁king ▁could ▁be ▁constructed ▁for ▁£ 4 0 , ▁and ▁that ▁following ▁its ▁completion ▁the ▁castle ▁would ▁be ▁handed ▁over ▁to ▁someone ▁else . ▁The ▁actual ▁cost ▁to ▁G und ulf ▁was ▁£ 6 0 . ▁The ▁bishop ▁was ▁a ▁sk illed ▁architect ▁and ▁super vised ▁the ▁construction ▁of ▁the ▁Tower ▁of ▁London ' s ▁e pon ym ous ▁White ▁Tower ▁on ▁beh alf ▁of ▁William ▁the ▁Con quer or . ▁G und ulf ' s ▁castle ▁was ▁adjacent ▁to ▁Ro chester ▁C athedral . ▁According ▁to ▁arch ae ologist ▁Oliver ▁Cre ight on , ▁when ▁cast les ▁were ▁position ed ▁close ▁to ▁churches ▁or ▁c athed r als ▁it ▁suggested ▁a ▁link ▁between ▁the ▁two , ▁and ▁in ▁this ▁case ▁both ▁were ▁owned ▁by ▁the ▁Bishop ▁of ▁Ro chester . ▁O ften ▁the ▁same ▁craft s men ▁and ▁architect s ▁would ▁work ▁on ▁these ▁closely ▁related ▁buildings , ▁leading ▁to ▁similar ities ▁in ▁some ▁of ▁their ▁features . ▁Al ong ▁with ▁Dur ham ▁and ▁Old