JEJU.- An illustration of a wooden tablet of Honghwagak, the Joseon era (1392-1910) office of a local administrator on the southern South Korean island of Jeju in South Korea. The Jeju provincial government said on 19 August that a group of scholars at Chungbuk National University have claimed the wooden tablet of Seoul s iconic gate Sungnyemun, produced in 1474, is preceded by the Jeju tablet, believed to have been made in 1435. The Sungnyemun tablet is known as the oldest among existing wooden tablets in the country. EPA/YONHAP.