A 1925 photo of Wongudan, an altar site in Seoul built in 1897 as a location for the performance of the rite of heaven. King Seongjong of the Goryeo Dynasty was the first to perform the rite, designed to ensure a bountiful harvest, in the tenth century. The practice was discontinued by later Goryeo kings, revived briefly in the mid fifteenth century by Sejo of the Joseon Dynasty, then reinstated with the founding of the Korean Empire in 1897. Much of the altar complex was destroyed during the Japanese occupation, and the gate and fountain seen here were also subsequently removed, leaving only the three-storey Hwangungu pagoda remaining.