▁The ▁fort ifications ▁were ▁strength ened ▁and ▁in ▁ 1 6 4 4 ▁the ▁castle ▁was ▁bes ie ged ▁again , ▁this ▁time ▁by ▁Parliament ary ▁forces ▁under ▁the ▁command ▁of ▁William ▁F iennes . ▁The ▁royal ▁governor , ▁the ▁ 1 8 - year - old ▁William ▁Com pton , ▁held ▁out ▁between ▁July ▁and ▁October , ▁when ▁Com pton ' s ▁brother , ▁James , ▁rel ieved ▁the ▁sie ge . ▁In ▁November , ▁Charles ▁I ▁d ined ▁in ▁the ▁castle . ▁In ▁January ▁ 1 6 4 6 ▁Sir ▁Edward ▁Wh al ley ▁placed ▁the ▁castle ▁under ▁sie ge ▁again ▁with ▁a ▁force ▁of ▁ 3 , 0 0 0 ▁men ; ▁the ▁Royal ist ▁cause ▁was ▁col laps ing , ▁and ▁in ▁May ▁Com pton ▁and ▁his ▁force ▁of ▁ 3 0 0 ▁men ▁surrender ed . ▁ ▁After ▁the ▁war ▁the ▁castle ▁itself ▁was ▁slight ed , ▁or ▁deliber ately ▁demol ished , ▁in ▁ 1 6 4 8 ▁to ▁prevent ▁its ▁further ▁use ; ▁F iennes ▁was ▁paid ▁£ 2 , 0 0 0 ▁by ▁Parliament ▁in ▁compens ation . ▁St ones ▁from ▁the ▁castle ▁were ▁later ▁used ▁to ▁build ▁houses ▁in ▁the ▁town . ▁ ▁Today ▁Nothing ▁can ▁now ▁be ▁seen ▁of ▁Ban bury ▁Castle , ▁whose ▁location ▁is ▁marked ▁by ▁Castle ▁Street . ▁The ▁site ▁was ▁exc av ated ▁in ▁ 1 9 7 3 – 7 4 . ▁ ▁See ▁also ▁Cast les ▁in ▁Great ▁Britain ▁and ▁Ireland ▁List ▁of ▁cast les ▁in ▁England