This reliquary monument, set up to honor eminent Goryeo monk and State Preceptor Hongbeop, had originally been located at a Buddhist temple called Jeongtosa in Jungwon-gun (today’s Chungju), Chungcheongbuk-do but was moved to Gyeongbokgung Palace in 1915 and, finally, to its current location in the National Museum of Korea in Seoul. Hongbeop was an eminent spiritual leader for the Korean Buddhists in the 10th century, introducing them to Seon (or Zen) Buddhism that he had studied in Tang. He was given the honorable title “State Preceptor” (Guksa) after “Great Seon Master” (Seonsa) when Goryeo was under the reign of King Seongjong (981-997). The stupa features a foundation consisting of a square slab supporting an octagonal base and a three-tier pedestal whose lower pedestal is shaped like a down-turned lotus blossom; the octagonal middle pedestal is elaborately carved with dragons flying between clouds, and the upper pedestal is shaped like an upturned lotus blossom. On the pedestal is a spherical stone carved with ropes tying the stone sphere crisscross with floral motifs placed on the spots where the ropes intersect. The roofstone is comparatively simple, with no significant ornamentation except the “corner flowers,” most of which are now missing. Under the roofstone are heavenly maids carved in relief. As a work built in 1017 when Goryeo was under the rule of King Hyeonjong (r. 1010-1031), the stupa had introduced some new elements even as it also maintained the style of Silla stupas characterized by an octagonal structure. With fine balance and harmony between new and old techniques and elements and use of a spherical stone for its main feature, the monument is widely considered one of the most valuable stupas erected during the Goryeo period.