Dae-ung-jeon Hall of Hwagyesa Temple is the main building of the temple and enshrines the statue of Shakyamuni Buddha. The temple was established in 1522, the 17th year of King Jungjong's rule of Joseon by a zen master Sinwol, but the current building was reconstructed in 1855, the 3rd year of King Gojong's rule, by the donation from Heungseon Daewongun, the king's biological father.
The building is three kan (each kan being the space between four columns, roughly 3.3 square meters) wide and three deep, and has hipped-and-gabled roof. The eaves are decorated, and supported, with multi-clustered bracket style in which brackets are lowered not just on the top of columns but also between them. All the architectural elements of this wooden structure, including the decoration of ceiling, show a typical late Joseon style.
The hall enshrines statues of the Buddha Triad recently made in which Shakyamuni Buddha is placed in the middle flanked by Avalokitesvara, the Buddhist Goddess of Mercy, and Mahathamaprapta Bodhisattva. The original Buddha statue enshrined here had been heavily damaged and is currently being kept in a separate place. The backdrop hanging behind the triad was painted by a monk named Hwasan in 1875 (12th year of King Gojong of Joseon). The calligraphy on the votive tablet of the Dae-ung-jeon Hall was written by Jeong Hak-gyo, a renowned calligrapher of the late Joseon era while the calligraphy on its columns was by Sin Gwan-ho who is widely regarded as the best pupil of Kim Jeong-hui, one of Joseon's greatest scholar-artists.

* Source : Website from the Bureau of Cultural Properties of Seoul