es ▁have ▁surv ived ▁from ▁the ▁ 1 5 th ▁century , ▁all ▁following ▁the ▁same ▁design ▁and ▁of ▁cru de ▁execution . ▁San ctu ary ▁rings ▁or ▁knock ers ▁exist ▁at ▁Nor wich , ▁Gl ouc ester ▁and ▁elsewhere ; ▁the ▁most ▁remarkable ▁is ▁that ▁on ▁the ▁north ▁door ▁of ▁the ▁nave ▁of ▁Dur ham ▁C athedral ▁which ▁has ▁sufficient ▁character ▁of ▁its ▁own ▁to ▁differenti ate ▁it ▁from ▁its ▁Cont inental ▁brothers ▁and ▁to ▁suggest ▁a ▁Northern ▁origin . ▁The ▁Gl ouc ester ▁Cand l est ick ▁in ▁the ▁Victoria ▁and ▁Albert ▁Museum ▁in ▁South ▁K ens ington , ▁displays ▁the ▁power ▁and ▁imagination ▁of ▁the ▁designer ▁as ▁well ▁as ▁an ▁extraordinary ▁manip ulative ▁skill ▁on ▁the ▁part ▁of ▁the ▁founder . ▁According ▁to ▁an ▁ins cription ▁on ▁the ▁object , ▁this ▁cand l est ick , ▁which ▁stands ▁some ▁ ▁high ▁and ▁is ▁made ▁of ▁an ▁al loy ▁al lied ▁to ▁bronze , ▁was ▁made ▁for ▁Abb ot ▁Peter ▁who ▁ruled ▁from ▁ 1 1 0 9 ▁to ▁ 1 1 1 2 . ▁While ▁the ▁outline ▁is ▁carefully ▁preserved , ▁the ▁orn ament ▁consists ▁of ▁a ▁mass ▁of ▁figures ▁of ▁mon sters , ▁birds ▁and ▁men , ▁mixed ▁and ▁inter tw ined ▁to ▁the ▁ver ge ▁of ▁confusion . ▁As ▁a ▁piece ▁of ▁casting ▁it ▁is ▁a ▁triumph ▁of ▁technical ▁ability . ▁For ▁sec ular ▁use ▁the ▁mort ar ▁was ▁one ▁of ▁the ▁common est ▁of ▁objects ▁in ▁England ▁as ▁on ▁the ▁Cont inent ; ▁early ▁examples ▁of ▁Goth