Tomb of King Muryeong
King Muryeong, who died in 523, was buried in a brick tomb at Songsan-ri, Gongju, in 525; it was found intact in 1971.

Paulsbgo · CC BY-SA 4.0 · Source
Built in the brick style of Liang China, it held epitaph stones naming its occupants — almost the only Three Kingdoms royal tomb whose owner is certain. The coffins were made of Japanese umbrella pine, found only in Japan.
Some 4,600 objects, including gold crown ornaments and a stone guardian beast, show Baekje’s close ties with southern China and Wa.