NE ▁of ▁Cho ▁O y u , ▁the ▁world ' s ▁ 6 th ▁highest ▁mountain . ▁ ▁S igu ang ▁Ri ▁has ▁two ▁significant ▁sub pe aks : ▁ ▁S igu ang ▁Ri ▁Sh ar ▁ ▁( 6 9 9 8 m , ▁Prom in ence ▁= ▁ 3 9 8 m ) ▁S igu ang ▁Ri ▁North west ▁ ▁( 6 8 4 0 m , ▁Prom in ence ▁= ▁ 3 4 0 m ) ▁ ▁References ▁ ▁Category : Mount ains ▁of ▁the ▁Tib et ▁Aut onom ous ▁Region ▁Category : Se ven - th ous and ers ▁of ▁the ▁H imal ay as <0x0A> </s> ▁Am mers o yen ▁Castle ▁() ▁is ▁located ▁in ▁Am mer z oden ▁in ▁the ▁B omm eler wa ard ▁region ▁in ▁the ▁province ▁of ▁Gel der land , ▁the ▁Netherlands . ▁When ▁the ▁original ▁construction ▁of ▁the ▁castle ▁occurred ▁is ▁unclear ; ▁some ▁sources ▁claim ▁it ▁was ▁as ▁early ▁as ▁the ▁ 1 2 th ▁century . ▁However , ▁the ▁cons ensus ▁among ▁histor ians ▁is ▁that ▁the ▁Van ▁Her la er ▁family ▁completed ▁the ▁castle ▁in ▁the ▁ 1 3 5 0 s . ▁At ▁the ▁time ▁of ▁its ▁construction , ▁the ▁castle ▁was ▁built ▁along ▁a ▁branch ▁of ▁the ▁River ▁Ma as . ▁Just ▁a ▁few ▁years ▁after ▁the ▁construction ▁of ▁the ▁castle ▁was ▁completed , ▁the ▁river ▁was ▁r er out ed ▁leaving ▁the ▁castle ▁to ▁be ▁surrounded ▁by ▁a ▁mo at . ▁ ▁Architecture ▁▁ ▁The ▁castle ▁was