les , ▁including ▁this ▁type ▁of ▁tower ▁castle , ▁the ▁opening ▁is ▁for ▁view ing ▁from ▁above ▁those ▁entering ▁the ▁castle ▁below . ▁This ▁opening , ▁called ▁a ▁" m ur der ▁hole ," ▁is ▁used ▁to ▁stop ▁unw el come ▁guests ▁before ▁they ▁can ▁proceed ▁any ▁further ▁in . ▁ ▁By ▁comparing ▁this ▁castle ▁to ▁other ▁similar ▁tower ▁cast les , ▁we ▁can ▁assume ▁that ▁the ▁lower ▁floor ▁was ▁mainly ▁a ▁gather ing ▁place . ▁The ▁second ▁floor ▁was ▁likely ▁the ▁d ining ▁area , ▁the ▁third ▁floor ▁the ▁kitchen ▁and ▁the ▁upper ▁flo ors ▁for ▁sleep ing . ▁ ▁Tower ▁cast les ▁were ▁used ▁for ▁look outs ▁and ▁to ▁send ▁warnings . ▁If ▁a ▁castle ▁was ▁under ▁attack , ▁a ▁fire ▁would ▁be ▁built ▁on ▁top ▁of ▁the ▁castle , ▁which ▁could ▁be ▁seen ▁for ▁about ▁fifty ▁miles ▁around , ▁or ▁to ▁the ▁next ▁tower ▁castle . ▁The ▁ru ins ▁of ▁these ▁cast les , ▁spac ed ▁about ▁fifty ▁miles ▁apart ▁can ▁thus ▁be ▁seen ▁period ically ▁as ▁one ▁travel s ▁throughout ▁the ▁country . ▁David ▁S weet man ▁wrote ▁" The ▁great ▁age ▁of ▁Irish ▁castle - building ▁began ▁with ▁the ▁arrival ▁of ▁the ▁Ang lo - N orm ans , ▁tradition ally ▁dated ▁to ▁ 1 1 6 9 , ▁and ▁continued ▁right ▁up ▁to ▁the ▁sevent e enth ▁century ." ▁ ▁Ba wn ▁House ▁Another ▁notable ▁residence ▁was ▁Ba wn ▁House , ▁near ▁Mo yd ow , ▁now ▁der el ict . ▁It ▁was ▁the ▁home ▁of ▁the