Kingdoms ( 삼국 , 三國 ) NorthSouth States Period ( 남북국 , 南北國 ) Korean dynasty ( 고려 , 高麗 ) the time of ... ) Sajeongjeon Hall and Gyeonghoeru Pavilion are rebuilt. 1431 (the 13th year of King Sejong ... installed. 1443 (the 25th year of King Sejong ) Gyejodang Hall and Gyotaejeon Halls are built. 1456