Eight-day procession led by King Jeongjo. Night time Military Exercises at Seojangdae, 1795. King Jeongjo's procession with his mother Lady Hyegyeonggung Hong, later Queen Heongyeong on her 60th birthday, in 1795 to the tomb of his father Crown Prince Sado (1735-1762). Hwaseong was depicted on an eight-fold screen painting. Jeongjo of Joseon (28 October 1752 - 18 August 1800) was the 22nd ruler of the Joseon Dynasty of Korea, 1776-1800. He made various attempts to reform and improve the nation of Korea.