Dakhma Exposure (Tower of Silence)

Zoroastrian theology treats earth, fire and water as sacred creations that must not be contaminated by contact with a corpse, which the tradition regards as a locus of nasu, a spiritual impurity or corrupting force believed to take hold of the body at the moment of death, a concern the tradition treats as ritually and cosmologically serious rather than merely practical.

Burial and cremation, the two most common funerary methods elsewhere in the world, are both therefore judged to defile a sacred element, earth or fire, and traditional Zoroastrian practice developed dakhma exposure, dokhmenashini, as the method that avoids both, exposing the body instead in a specially constructed dakhma, a raised circular structure with no roof, popularly known in English as a tower of silence, so that the flesh is consumed by scavenging birds and the sun rather than committed to earth, fire or water. The remains, once skeletonised, were traditionally understood to be sufficiently free of nasu that the bones could then be placed without further concern in a central ossuary pit within the structure itself, completing the funerary process without any of the sacred elements having been directly touched by the corrupting matter of death.

Dakhma exposure has become substantially harder to sustain in recent decades, chiefly because of a catastrophic, well documented collapse in South Asian vulture populations from the 1990s onward, caused by the veterinary drug diclofenac entering the food chain through livestock carcasses, which removed the birds the practice depends on to complete the process quickly and left bodies at some towers of silence, particularly in Mumbai, decomposing far more slowly and visibly than the tradition intends. That ecological crisis has forced the Parsi community, the Zoroastrian community of India descended from migrants from Iran, into difficult and genuinely divided debate over how to respond, with some authorities supporting solar concentrators to accelerate decomposition and others, more reluctantly, accepting cremation or burial for at least some of their dead, a shift traditionalists within the community have opposed as a departure from correctly maintained practice.

Iranian Zoroastrians largely abandoned dakhma exposure earlier, under twentieth century government pressure and changing urban conditions, shifting mostly to burial in concrete lined graves designed to minimise earth contact, a compromise solution distinct from the towers of silence still standing, though increasingly contested in their use, in India today. The practice remains a live and unresolved point of internal Zoroastrian debate rather than a settled question either way.