Gyeongbokgung

On the 2nd day, 4th month of 1865, Queen Sinjeong, regent of the penultimate Korean monarch King Gojong (r. 1864–1907), ordered that the palace be reconstructed. Construction began on the 13th day of that month. Gojong and the royal family moved into the palace on the 2nd day, 7th month of 1868. Construction continued until 1873. The palace experienced a major fire on the 10th day, 12th month of 1873. After delays due to financial restraints, reconstruction began on the 27th day, 3rd month of 1875.

The rebuilt palace was designed to reflect various concepts in the I Ching and Taijitushuo, such as yin and yang, the bagua, and the hexagram. New buildings were named by the Yŏnggŏndogam. The palace was densely packed with buildings. Attempts were made to give some of the buildings' roofs blue tiles, like was done in the original palace, but the Goryeo ware techniques needed to create these had been lost during the Imjin War, when the ceramics industry collapsed and many Korean artisans were enslaved and taken to Japan. Ultimately, such tiles were not used in the recreation.

In 1421, Sejong the Great (r. 1418–1450) made Gyeongbokgung his primary palace. By 1427, he officially moved out of Changdeokgung and into Gyeongbokgung. Sejong greatly renovated and expanded the palace. It was during Sejong's reign that Gyeongbokgung became fully-fledged and functional. Under Sejong, the palace hosted a number of scientific devices, including the water clock Borugak Jagyeongnu, a facility for producing movable type, and the astronomical observatory Ganuidae. The palace was then host to the Hall of Worthies and Ŏnmunch'ŏng, which assisted Sejong in developing Hangul.