King Munmu willed that his body be cremated in a simple funeral ceremony and that his remains be buried under the large rock off the east shore at Gampo.
The rock is now called Daewangam Rock. The surrounding pillars of rocks form a placid pond.
The pavilion, looking out on Daewangam Rock, is where King Sinmun was said to have seen the dragon, King Munmu's incarnation.
It is also said that he was given 'manpasikjeok,' a legendary flute, which has power to ease disturbances in the world.