What is "herodium"

Herodium or Herodion (from ; , , Jabal al-Fraidees) is a truncated cone-shaped hill, located south of Jerusalem and southeast of Bethlehem, in the Judaean Desert, West Bank. Herod the Great built a fortress, a palace, and a small town in Herodium, between 23 and 15 BCE, and is believed to have been buried there. Herodium is 758 meters (2,487 ft) above sea level, the highest peak in the Judaean Desert. Today, the site is managed by the Israel National Parks Authority.