As its name suggests, Okcheongyo ('jade stream bridge') was where officials 'cleansed their mind and body' before having an audience with the king at the royal audience hall. The bridge features a pair of arches and hand railings with auspicious animals on newel posts, and the central pier carved with demonic faces which are intended to repel evil forces invading the palace through the water flowing under it. Other Joseon palaces have similar bridges, including Yeongjegyo in Gyeongbokgung Palace and Geumcheongyo in Changdeokgung Palace. The bridge was built to be part of Changgyeonggung Palace when it was built in 1484, and designated as the Treasure No. 386.""