▁the ▁re bel ▁arm ies ▁raised ▁the ▁sie ge ▁in ▁the ▁face ▁of ▁relief ▁from ▁Henry ▁himself . ▁The ▁g arrison ▁did ▁not ▁surrender , ▁and ▁the ▁castle ▁suffered ▁extensive ▁damage ▁that ▁was ▁not ▁rep a ired ▁until ▁the ▁following ▁century . ▁The ▁castle ▁saw ▁military ▁action ▁for ▁the ▁last ▁time ▁in ▁ 1 3 8 1 ▁when ▁it ▁was ▁captured ▁and ▁r ans ack ed ▁during ▁the ▁Pe as ants ' ▁Revol t . ▁As ▁Ro chester ▁Castle ▁fell ▁out ▁of ▁use ▁its ▁materials ▁were ▁re used ▁elsewhere ▁and ▁cust od ians hip ▁rel in qu ished ▁by ▁the ▁Crown . ▁The ▁castle ▁and ▁its ▁grounds ▁were ▁opened ▁to ▁the ▁public ▁in ▁the ▁ 1 8 7 0 s ▁as ▁a ▁park . ▁At ▁various ▁points ▁during ▁the ▁ 1 9 th ▁and ▁ 2 0 th   cent uries ▁rep airs ▁were ▁carried ▁out . ▁The ▁castle ▁is ▁protected ▁as ▁a ▁Gra de   I ▁listed ▁building ▁and ▁Sch eduled ▁Monument . ▁Today ▁the ▁ru ins ▁are ▁in ▁the ▁guard ians hip ▁of ▁English ▁Heritage ▁and ▁open ▁to ▁the ▁public . ▁ ▁Early ▁history ▁ ▁Cast les ▁were ▁introduced ▁to ▁England ▁by ▁the ▁Norm ans ▁in ▁the ▁ 1 1 th   century ▁and ▁their ▁construction , ▁in ▁the ▁w ake ▁of ▁the ▁con quest ▁of ▁ 1 0 6 6 , ▁helped ▁the ▁Norm ans ▁secure ▁their ▁new ▁territory . ▁Ro chester ▁was ▁an ▁important ▁city , ▁built ▁on ▁the ▁site ▁of ▁a ▁Roman ▁town ▁at ▁the ▁j unction ▁of