Tower of Silence: "Zoroastrianism was once one of the major religions of the world. Its practitioners believed that not only was a dead body spiritually unclean, but that a corpse demon, or nasu daeva, would rush in and inhabit the body upon death."
Towers of Silence: Zoroastrian Architectures for the Ritual of Death
TOWERS OF SILENCE: ZOROASTRIAN ARCHITECTURES A Dakhma (Persian: دخمه) also known as "Cheel Ghar" in Hindi and "Tower of Silence" in English, is a circular, raised structure used by Zoroastrians for exposure of the dead, particularly to scavenging birds.
A Tower of Silence, or Dakhmeh, is a structure laying on the top of a hill, consisting of concentric slabs surrounding a central pit. The bodies were arranged onto four concentric rings: men, outermost, than women and children. Despite the fact the the birds of prey needed less than an hour to leave nothing but bones, the remains of the dead were left bleaching on the upper circles no less than a year before the nasellars could come and push the skeletons onto the underlying ossuary pit.