9 6 6 . ▁ ▁Early ▁history ▁ ▁Loc ated ▁on ▁Sep ul ved a ▁Bou lev ard ▁in ▁Mission ▁Hills , ▁the ▁original ▁part ▁of ▁the ▁Rom ulo ▁P ico ▁Ad obe ▁was ▁built ▁in ▁ 1 8 3 4 ▁by ▁T ong va - Fern ande ño , ▁Tat av iam - Fern ande ño , ▁and ▁Ch um ash - V ent ua ño ▁Native ▁Americans ▁( Ind ians ) ▁from ▁the ▁San ▁Fernando ▁Mission . ▁The ▁original ▁purpose ▁of ▁the ▁structure ▁is ▁unknown , ▁though ▁the ▁ad obe ▁was ▁located ▁in ▁the ▁center ▁of ▁the ▁Mission ' s ▁orch ards ▁and ▁surrounding ▁v ine y ards . ▁ ▁Before ▁ 1 8 4 6 , ▁the ▁original ▁ad obe ▁consisted ▁of ▁what ▁is ▁now ▁the ▁living ▁room . ▁In ▁ 1 8 4 5 , ▁Juan ▁Mans o ▁and ▁And rés ▁P ico ▁had ▁been ▁granted ▁a ▁nine - year ▁le ase ▁by ▁the ▁latter ' s ▁brother ▁Governor ▁P ío ▁P ico ▁for ▁the ▁Mission ▁San ▁Fernando ▁Rey ▁de ▁España ▁lands . ▁In ▁ 1 8 4 6 ▁the ▁P ío ▁P ico ▁government ▁sold ▁E ul og io ▁de ▁Cel is ▁the ▁sec ular ized ▁Mission ▁lands , ▁nearly ▁the ▁entire ▁San ▁Fernando ▁Valley , ▁as ▁the ▁Ran cho ▁Ex - M ission ▁San ▁Fernando , ▁which ▁included ▁the ▁P ico ▁Ad obe . ▁The ▁d ining ▁room ▁and ▁library ▁were ▁added ▁during ▁the ▁time ▁of ▁de ▁Cel is ' ▁ownership . ▁ ▁De ▁Cel is ▁vac