Gameunsaji Temple Site was built by King Munmu (AD 661-681), the king of Silla who unified Baekje and Goguryeo in the late 7th century. The purpose of the temple site was to pray for help and guidance from Buddha against Japanese nvasion. Unfortunately, King Munmu passed away before the completion of the temple, and left a will to be cremated and buried in the East Sea so that he may reincarnate as a sea dragon in order to protect the country. As he wished, King Munmu's ashes were scattered at Daewangam of the East Sea. The temple was completed and was named by his son, King Sinmun (AD 681-692) in respect and appreciation for his father.