▁castle ▁stands ▁on ▁a ▁lim estone ▁bl uff ▁over looking ▁the ▁Care w ▁in let , ▁part ▁of ▁the ▁tid al ▁est u ary ▁that ▁makes ▁up ▁the ▁Mil ford ▁H aven ▁Water way . ▁The ▁site ▁must ▁have ▁been ▁recogn ised ▁as ▁strateg ically ▁useful ▁from ▁the ▁earliest ▁times , ▁and ▁recent ▁exc av ations ▁in ▁the ▁outer ▁w ard ▁have ▁discovered ▁multiple ▁def ensive ▁walls ▁of ▁an ▁Iron ▁Age ▁fort . ▁ ▁The ▁Norman ▁castle ▁has ▁its ▁orig ins ▁in ▁a ▁stone ▁keep ▁built ▁by ▁Ger ald ▁de ▁W inds or ▁around ▁the ▁year ▁ 1 1 0 0 . ▁Ger ald ▁was ▁made ▁cast ellan ▁of ▁P embro ke ▁Castle ▁by ▁Arn ulf ▁of ▁Mont gom ery ▁in ▁the ▁first ▁Norman ▁invasion ▁of ▁P embro kes hire . ▁He ▁married ▁N est , ▁prin cess ▁of ▁De he ub arth ▁around ▁ 1 0 9 5 . ▁N est ▁brought ▁the ▁man or ▁of ▁Care w ▁as ▁part ▁of ▁her ▁dow ry , ▁and ▁Ger ald ▁cleared ▁the ▁existing ▁fort ▁to ▁build ▁his ▁own ▁castle ▁on ▁Norman ▁lines . ▁The ▁original ▁outer ▁walls ▁were ▁tim ber , ▁and ▁only ▁the ▁keep ▁was ▁of ▁stone . ▁This ▁still ▁exists ▁in ▁the ▁later ▁structure ▁as ▁the ▁" Old ▁Tower ". ▁ ▁Med ieval ▁ ▁Ger ald ' s ▁son ▁William ▁took ▁the ▁name ▁" de ▁Care w ", ▁and ▁in ▁the ▁middle ▁of ▁the ▁ 1 2 th ▁century ▁created ▁an ▁en closure ▁with ▁stone ▁walls ▁incorpor ating ▁the ▁original ▁keep ,