▁( née ▁Bag ge ). ▁He ▁had ▁children ▁in ▁all ▁three ▁mar ri ages , ▁including ▁Jon as ▁Pat rik ▁L j ung ström . ▁ ▁Active ▁as ▁a ▁j ew eler ▁and ▁burg her ▁in ▁Stockholm , ▁U d de val la , ▁and ▁Saint ▁Petersburg , ▁Russian ▁Empire , ▁works ▁surv iving ▁from ▁his ▁at el iers ▁include ▁r anging ▁from ▁c ib or iums ▁preserved ▁by ▁the ▁Church ▁of ▁Sweden , ▁to ▁j ew l ry ▁for ▁personal ▁ad orn ment ▁represented ▁by ▁the ▁Nord ic ▁Museum , ▁as ▁well ▁as ▁regional ▁cultural ▁her itage ▁museum s . ▁The ▁j ew el ry ▁business ▁started ▁by ▁L j ung ström ▁was ▁with ▁time ▁over t aken ▁by ▁his ▁descend ants , ▁remaining ▁one ▁of ▁the ▁oldest ▁active ▁j ew el ers ▁in ▁the ▁region . ▁ ▁As ▁an ▁invent or , ▁he ▁was ▁noted ▁for ▁his ▁pione ering ▁in ▁gas ▁light ing . ▁Sub sequ ent ▁to ▁initial ▁experiments ▁in ▁own ▁at el iers ▁with ▁co pper ▁appar atus es ▁and ▁ch and el iers ▁of ▁in k , ▁br ass ▁and ▁cry stal , ▁the ▁technology ▁was ▁exhibition ed ▁in ▁the ▁city ▁of ▁U d de val la , ▁reported ly ▁one ▁of ▁the ▁first ▁such ▁public ▁install ations ▁of ▁gas ▁light ning ▁in ▁the ▁region , ▁en hanced ▁as ▁a ▁tri um phal ▁arch ▁for ▁the ▁city ▁gate ▁for ▁a ▁royal ▁visit ▁of ▁Charles ▁XIV ▁John ▁of ▁Sweden ▁in ▁ 1 8 2 0 . ▁ ▁Among ▁his