ant ▁is ▁the ▁music ian ▁J ools ▁Holland . ▁The ▁castle ▁and ▁its ▁setting ▁was ▁listed ▁as ▁a ▁Sch eduled ▁monument ▁in ▁ 1 9 4 6 , ▁the ▁Gate house ▁and ▁the ▁Inner ▁Ward ▁were ▁separately ▁listed ▁as ▁Gra de ▁I ▁in ▁ 1 9 6 6 , ▁while ▁the ▁bar n ▁was ▁Gra de ▁II ▁listed ▁in ▁ 1 9 8 6 . ▁C ool ing ▁Castle ▁is ▁listed ▁on ▁English ▁Heritage ' s ▁" Her itage ▁at ▁R isk " ▁register ▁due ▁to ▁the ▁very ▁poor ▁condition ▁of ▁its ▁fabric . ▁The ▁castle ▁can ▁be ▁viewed ▁from ▁the ▁road , ▁but ▁s its ▁on ▁private ▁property ▁and ▁is ▁not ▁open ▁to ▁the ▁public . ▁ ▁Description ▁ ▁C ool ing ▁Castle ▁has ▁an ▁unusual ▁layout ▁that ▁was ▁perhaps ▁dict ated ▁by ▁the ▁mar sh y ▁ground ▁on ▁which ▁it ▁was ▁constructed . ▁Most ▁quadr angular ▁cast les ▁were ▁constructed ▁on ▁a ▁single ▁mo ated ▁island ▁within ▁which ▁was ▁a ▁system ▁of ▁inner ▁w ards ▁or ▁cour ty ards . ▁C ool ing ▁Castle ▁differ ed ▁in ▁that ▁within ▁its ▁ 8 ▁a cre ▁( 3 . 2 ▁ha ) ▁per imeter ▁it ▁had ▁two ▁w ards ▁of ▁different ▁sizes ▁arranged ▁side ▁by ▁side . ▁Each ▁stood ▁on ▁a ▁m ound ▁within ▁a ▁figure ▁of ▁eight - sh aped ▁system ▁of ▁mo ats ▁and ▁d itch es . ▁The ▁inner ▁w ard , ▁in ▁the ▁western ▁part ▁of ▁the ▁castle , ▁appears ▁to ▁have ▁been ▁surrounded ▁by ▁a ▁mo at ▁that