Tomb of Kim Yu-sin, Gyeongju
A Unified Silla tomb said to be Kim Yu-sin’s. Its retaining stones are carved with the twelve zodiac guardians in civilian dress holding weapons.

Alain Seguin · CC BY-SA 3.0 · Source
This round earthen mound on the slope of Mt. Songhwa, Gyeongju, is said to be the tomb of Kim Yu-sin (595–673). The retaining stones around its base are carved with the twelve zodiac guardians — human bodies with the heads of the rat, ox, tiger and so on — and a stone railing runs around it.
In Unified Silla, stone-chamber tombs ringed with zodiac-carved retaining stones spread. The tomb of King Seongdeok and Gwaereung (tomb of King Wonseong), with its warrior statues of Central Asian look, are the classic examples, and the style passed through the tomb of King Gongmin of Goryeo to the royal tombs of Joseon. Because the tomb is almost royal in form, some think its occupant was a Silla king.