Masada (Hebrew מצדה, pronounced, from מצודה, metzuda, "fortress") is the name for a site of ancient palaces and fortifications in the South District of Israel on top of an isolated rock plateau, or horst, on the eastern edge of the Judean Desert overlooking the Dead Sea. After the First Jewish-Roman War a siege of the fortress by troops of the Roman Empire led to the mass suicide of the Sicarii rebels, who preferred death to surrender. It is located about 20 km east of Arad.