《八棱碑》原名《石堡战楼颂碑》，它是志记唐军在天宝八年取得石堡城战役胜利的功勋柱，高约２米以上，由红砂岩石料制成，因其呈八面体而得此俗名。原立于石堡城西南所依山顶的了望楼边（地处今日甘肃省卓尼县卡车乡阳坝村西南山顶的平掌处）。宋明以来仆于荒野而无人识记。 “Eight Corners” Formerly known as “Stone Fort war lords”, it is the Tang Ji Jun in Tianbao eight years to obtain the victory of Fort Stone City Battle column, about 2 meters high, made of red sandstone stone, because of its was Octahedral derived from this common name. Originally located in the southwest of Stone Castle Fort by the top of the Hope House (located in Gansu Province Zhuoni County Truck Village Yangba southwest top of the hill). Since the Song and Ming dynasties in the wilderness and no one recorded.