Stories of Korea’s National Treasures 41Photo Credit: Cultural Heritage Administration of KoreaIron Flagpole Supports at the Site of Yongdusa Temple(Cheongju, Chungcheongbuk-do)🏯 1. The Guardians of an Invisible BannerAt the ancient site of Yongdusa Temple in Cheongju stand two tall iron pillars — the Iron Flagpole Supports, silent yet powerful remnants of Silla’s Buddhist faith.Erected in the ..