▁the ▁parent ▁Society ▁in ▁New ▁York ▁City . ▁ ▁The ▁NS CD A ▁was ▁intended ▁as ▁a ▁feder ation ▁of ▁State ▁Soci eties ▁in ▁which ▁each ▁unit ▁had ▁a ▁degree ▁of ▁aut onomy . ▁ ▁Another ▁society ▁formed ▁around ▁the ▁same ▁time ▁was ▁the ▁D augh ters ▁of ▁the ▁American ▁Revolution . ▁Organ ized ▁following ▁the ▁United ▁States ▁Cent enn ial ▁of ▁ 1 8 7 6 ▁and ▁a ▁Cent enn ial ▁in ▁New ▁York ▁in ▁ 1 8 8 9 ▁( ce le br ating ▁the ▁Constitution ), ▁they ▁built ▁on ▁renew ed ▁interest ▁in ▁America ' s ▁past ▁to ▁work ▁for ▁pres ervation ▁of ▁historic ▁collections ▁and ▁buildings , ▁and ▁education ▁related ▁to ▁United ▁States ▁history . ▁The ▁NS CD A ▁has ▁been ▁a ▁leader ▁in ▁the ▁field ▁of ▁historic ▁pres ervation , ▁rest oration ▁and ▁the ▁interpretation ▁of ▁historic ▁sites ▁since ▁its ▁New ▁York ▁Society ▁first ▁under to ok ▁the ▁pres ervation ▁of ▁the ▁Van ▁Cort land t ▁House ▁in ▁ 1 8 9 7 . ▁ ▁In ▁November ▁ 2 0 0 0 , ▁the ▁NS CD A ▁received ▁the ▁pr estig ious ▁Trust ee ▁Emer it us ▁Award ▁for ▁Ex cell ence ▁in ▁the ▁Ste ward ship ▁of ▁historic ▁sites ▁from ▁the ▁National ▁Trust ▁for ▁Historic ▁Pres ervation . ▁Today ▁ 4 1 ▁diverse ▁properties ▁are ▁owned ▁out right ▁by ▁the ▁Corpor ate ▁Soci eties ▁of ▁the ▁NS CD A , ▁ 1 3 ▁additional ▁museum ▁collections ▁are ▁owned ▁by ▁the ▁D ames ▁and ▁ 3 0 ▁more