▁centre ▁of ▁one ▁of ▁Cass els ' s ▁tra dem ark ▁' s ugg ested ' ▁port ico es , ▁is ▁on ▁a ▁raised ▁piano ▁nob ile . ▁ ▁It ▁is ▁reached ▁by ▁a ▁broad ▁flight ▁of ▁steps . ▁ ▁The ▁principal ▁feature ▁of ▁the ▁inter iors ▁are ▁the ▁ro c oco ▁pl aster - work ▁and ▁the ▁ce il ings , ▁again ▁by ▁the ▁master ▁st u cco ists ▁Paul ▁and ▁Philip ▁Lan f rach ini ; ▁and ▁orn ate ▁car ved ▁mar ble ▁fire p laces , ▁all ▁contrast ing ▁with ▁the ▁a uster ity ▁of ▁the ▁exterior . ▁ ▁Summer hill ▁House ▁( 1 7 3 1 ) ▁Summer hill ▁House ▁was ▁a ▁vast ▁P all ad ian ▁m ansion ▁in ▁County ▁Me ath ▁originally ▁designed ▁by ▁Pear ce , ▁who ▁died ▁before ▁the ▁project ▁was ▁comm enced . ▁Cass els ▁took ▁over ▁the ▁project ▁and ▁was ▁responsible ▁for ▁the ▁ro c oco ▁inter iors . ▁The ▁building ▁was ▁dam aged ▁by ▁fire ▁in ▁the ▁ 1 9 2 0 s ▁and ▁finally ▁demol ished ▁in ▁the ▁ 1 9 7 0 s . ▁ ▁Pow ers court ▁House ▁( 1 7 4 1 ) ▁ ▁Pow ers court ▁House , ▁W ick low , ▁was ▁a ▁large ▁country ▁house , ▁originally ▁a ▁ 1 3 th - century ▁castle , ▁which ▁was ▁completely ▁re built ▁by ▁Cass els , ▁starting ▁in ▁ 1 7 3 0 ▁and ▁finishing ▁in ▁ 1 7 4 1 . ▁ ▁The ▁dem es