A diverse variety of animal bones has been found in the moat at the Wolseong palace ruins in Gyeongju. Bear bones have been excavated in larger numbers than at other ruins. Thirteen bones have been confirmed so far, from at least three bears. Their existence in the moat is believed to have been for the making of flags for Silla armies. Historical records show the use of bearskin for this purpose and the parts found match the records. There are also workshop ruins near the palace site. The bones show traces of their skeletons having been dismantled, which suggests the dismantling and usage took place near the ruins.