▁R ains borough ▁for ▁the ▁Parliament arian ▁side ; ▁after ▁a ▁sie ge ▁that ▁saw ▁can non ▁being ▁fired ▁at ▁point - blank ▁range ▁from ▁the ▁adjacent ▁church ▁roof ▁of ▁Saint ▁Mary ▁the ▁Virgin , ▁the ▁Royal ▁g arrison ▁surrender ed . ▁As ▁was ▁usual ▁the ▁walls ▁were ▁left ▁bre ached ▁after ▁this ▁sie ge , ▁but ▁the ▁Ber keley ▁family ▁were ▁allowed ▁to ▁retain ▁ownership ▁on ▁condition ▁that ▁they ▁never ▁rep a ired ▁the ▁damage ▁to ▁the ▁Keep ▁and ▁Out er ▁Ba iley ; ▁this ▁is ▁still ▁enfor ced ▁today ▁by ▁the ▁Act ▁of ▁Parliament ▁drawn ▁up ▁at ▁the ▁time . ▁According ▁to ▁the ▁Pe vs ner ▁Arch itect ural ▁Gu ides ▁the ▁bre ach ▁is ▁partially ▁filled ▁by ▁a ▁subsequent ▁' mod ern ' ▁re build , ▁but ▁this ▁only ▁amounts ▁to ▁a ▁low ▁garden ▁wall , ▁to ▁stop ▁people ▁falling ▁ 2 8 ▁feet ▁from ▁the ▁Keep ▁Garden , ▁the ▁original ▁Castle ' s ▁" m otte ". ▁ ▁In ▁the ▁early ▁ 1 8 th ▁century ▁the ▁ 4 th ▁Earl ▁of ▁Ber keley ▁plant ed ▁a ▁p ine ▁that ▁was ▁re put ed ▁to ▁have ▁been ▁grown ▁from ▁a ▁cutting ▁taken ▁from ▁a ▁tree ▁at ▁the ▁Battle ▁of ▁C ull oden . ▁In ▁the ▁early ▁ 2 0 th ▁century ▁the ▁ 8 th ▁Earl ▁of ▁Ber keley ▁rep a ired ▁and ▁rem od elled ▁parts ▁of ▁the ▁castle ▁and ▁added ▁a ▁new ▁por ch ▁in ▁the ▁same ▁Goth ic ▁style ▁as ▁the ▁rest ▁of ▁the ▁building .