▁Mal ang ▁Reg ency , ▁East ▁Java , ▁Indones ia . ▁The ▁stup a ▁is ▁located ▁on ▁the ▁high lands , ▁on ▁the ▁southern ▁slope ▁of ▁Mount ▁Ar j uno , ▁surrounded ▁by ▁numbers ▁of ▁waters pr ings . ▁ ▁It ▁is ▁located ▁about ▁ 6 ▁kilometres ▁north ▁from ▁Sing has ari ▁temple , ▁therefore , ▁the ▁stup a ▁is ▁tradition ally ▁linked ▁to ▁the ▁historic ▁Sing has ari ▁Kingdom ▁that ▁ruled ▁the ▁area ▁circa ▁ 1 3 th ▁Century ▁CE . ▁The ▁exper ts ▁however , ▁suggest ▁that ▁the ▁stup a ▁structure ▁is ▁dated ▁from ▁about ▁the ▁end ▁of ▁ 1 4 th ▁century ▁to ▁the ▁beginning ▁of ▁ 1 5 th ▁century , ▁during ▁Maj ap ah it ▁period . ▁ ▁Str ucture ▁S umber aw an ▁is ▁quite ▁unique , ▁since ▁it ▁was ▁the ▁only ▁Buddh ist ▁shr ine ▁in ▁East ▁Java ▁that ▁was ▁built ▁in ▁the ▁shape ▁of ▁stup a ▁structure . ▁In ▁contrast ▁to ▁Buddh ist ▁tem ples ▁in ▁the ▁region ▁that ▁built ▁in ▁typical ▁cand i ▁architecture ; ▁such ▁as ▁nearby ▁Sing has ari , ▁J ago , ▁Bra hu ▁in ▁T row ul an ▁and ▁J ab ung ▁temple ▁in ▁P ait on . ▁ ▁The ▁stup a ▁consists ▁of ▁square ▁base ▁and ▁cyl ind rical ▁body ▁of ▁bell - sh aped ▁stup a , ▁a kin ▁to ▁Central ▁J avan ese ▁Bor ob ud ur - style ▁stup a , ▁while ▁the ▁p inn acle ▁is ▁missing . ▁The ▁structure ▁is ▁made ▁of ▁and es