Heonanwangneung in Seoak-dong, Gyeongju, is the tomb of Heonan, the 47th king of Silla, who reigned from 857 to 861. Early in his reign, drought and poor harvests led him to repair embankments and encourage farming. He also used Buddhism in policies aimed at easing discontent among local powers. The tomb sits in Gyeongju, Gyeongsangbuk-do.