Janggyeongsa Temple was designated as Gyeonggi-do Cultural Property Material No. 15 in 1983. Originally 9 temples were located in Namhansanseong Fortress but only the four temples of Janggyeongsa Temple, Gaewonsa Temple, Gukcheongsa Temple remain today. Janggyeongsa Temple is situated 2km north from the East Gate of Namhansanseong Fortress. It has a tranquil ambience even though the temple is close to Seoul so visitors can feel the peaceful mood of a mountain temple. When construction began on Namhansanseong Fortress in 1624 (2nd year of King Injo's reign), the king made a Buddhist military group from the eight provinces to participate in fatigue duty in assisting to build temples in the 3rd year of the king. Including Mangwolsa Temple and Okjeongsa Temple, previously existing accommodations of Buddhist military, Gaewonsa Temple, Hanheungsa Temple, Gukcheongsa Temple, Cheonjusa Temple and other new temples were built in 1638 (King Injo, 16th year). Janggyeongsa Temple is the only remaining temple which was established at that time.