King Munjong (1414–1452) was the fifth King of the Joseon Dynasty, who ruled Korea from 1450 to 1452. He was the eldest son of King Sejong and succeeded him in 1450, but died of disease two years later. He was succeeded by his son, Danjong of Joseon.
Most of Munjong's achievements were performed during his princely life. Although credited is primarily given to Jang Yeong-sil for inventing the water gauge, the Annals of the Joseon Dynasty state that it was the Crown Prince who found measures of water levels in the ground. Also, it was Munjong who took care of state affairs late during King Sejong's reign, as Sejong developed various illnesses and disorders.
Munjong was the longest holder of the position of Crown Prince during the Joseon Dynasty, holding the position from 1421 to 1450, a record 29 years. From 1442 until his own accession to the throne in 1450, he served as regent to King Sejong.
^Daughter of Kim O-mun (김오문), Lord Anjeong (안정공), Magistrate Pandon-ryeong (판돈령부사); and Lady Yi (이씨 부인). Granddaughter of Kim Gu-deok (김구덕). Niece of Royal Noble Consort Myeong (명빈 김씨), thru her relationship as Kim Oh-mun's elder sister
^First Princess Consort to the Royal Prince Successor, married in 1427. Formally separated in August 18, 1429, then later committed suicide
^Daughter of Bong Yeo (봉여), who killed her himself
^Second Princess Consort to the Royal Prince Successor, married in October 15, 1429. Formally separated in October 26, 1436 (instigated by Sejong himself), due to a series of scandals, involving her lie of her pregnancy, and her being caught in a lesbian act (sleeping with one of her palace maids) by Sejong himself, in 1435
^One of Munjong's former concubines; Seung-hwi rank. Became Lady Hyeondeok, the Princess Consort to the Royal Prince Successor (현덕빈) upon her marriage
^Was demoted in June 26, 1457, as Lady Hyeondeok, following her son's deposition and demotion as Deposed Prince Nosan (노산군) in June 21, 1457. Was posthumously restored back in March 12, 1513, and finally in July 15, 1699
^Daughter of Kwon Jeon (권전), Internal Prince Hwasan (화산부원군); and Lady Haeju, Princess Consort to the Internal Prince, of the Choi clan (해주부부인 최씨)
^Firstly ranked as "Royal Prince Successor Descendant" (왕세손), when Munjong was still "Royal Prince Successor" (왕세자) during Sejong's reign. Became the Royal Crown Prince when his father became King