Tower of Silence

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A dakhma (Persian: دخمه), otherwise referred to as Tower of Silence (Persian: برجِ خاموشان), is a circular, raised structure built by Zoroastrians for excarnation (that is, the exposure of human corpses to the elements with the purpose to enable their decomposition), in order to avoid contamination of the soil and other natural elements by the decomposing dead bodies.^[1][2][3] Carrion birds, usually vultures and other scavengers, consume the flesh.^[1][2] Skeletal remains are gathered into a central pit where further weathering and continued breakdown occurs.^[1][2]

Zoroastrian ritual exposure of the dead is first attested in the mid-5th century BCE Histories of Herodotus, an Ancient Greek historian who observed the custom amongst Iranian expatriates in Asia Minor; however, the use of towers is first documented in the early 9th century CE.^[1][2] In Herodotus' account (in Histories i.140), the Zoroastrian funerary rites are said to have been "secret"; however they were first performed after the body had been dragged around by a bird or dog. The corpse was then embalmed with wax and laid in a trench.^[4]

Writing on the culture of the Persians, Herodotus reports on the Persian burial customs performed by the magi, again, kept secret, according to his account. However, he writes that he knows they expose the body of male dead to dogs and birds of prey, then they cover the corpse in wax, and then it is buried.^[5] The Achaemenid custom for the dead is recorded in the regions of Bactria, Sogdia, and Hyrcania, but not in Western Iran.^[6][7]

The discovery of ossuaries in both Eastern and Western Iran dating to the 5th and 4th centuries BCE indicate that bones were sometimes isolated, but separation occurring through ritual exposure cannot be assumed: burial mounds,^[8] where the bodies were wrapped in wax, have also been discovered. The tombs of the Achaemenid emperors at Naqsh-e Rustam and Pasargadae likewise suggest non-exposure, at least until the bones could be collected. According to legend (incorporated by Ferdowsi into his Shahnameh; lit. 'The Book of Kings'), Zoroaster himself is interred in a tomb at Balkh (in present-day Afghanistan).

The Byzantine historian Agathias has described the Zoroastrian burial of the Sasanian general Mihr-Mihroe: "the attendants of Mermeroes took up his body and removed it to a place outside the city and laid it there as it was, alone and uncovered according to their traditional custom, as refuse for dogs and horrible carrion".^[6][9]

Towers are a much later invention and are first documented in the early 9th century CE.^[10] The funerary ritual customs surrounding that practice appear to date to the Sassanid era (3rd–7th CE). They are known in detail from the supplement to the Shayest ne Shayest, the two Rivayat collections, and the two Saddars.

One of the earliest literary descriptions of such a building appears in the late 9th-century Epistles of Manushchihr, where the technical term is astodan, 'ossuary'. Another term that appears in the 9th- to 10th-century texts of Zoroastrian tradition (the so-called "Pahlavi books") is dakhmag; in its earliest usage, it referred to any place for the dead.

The doctrinal rationale for exposure is to avoid contact with earth, water, or fire, all three of which are considered sacred in the Zoroastrian religion.^[2][3]

Zoroastrian tradition considers human cadavers and animal corpses (in addition to cut hair and nail parings) to be nasu, i.e. unclean, polluting.^[1][2][3] Specifically, Nasu the corpse demon (daeva), is believed to rush into the body and contaminate everything it comes into contact with.^[3][11] For this reason, the Vīdēvdād (an ecclesiastical code whose title means, 'given against the demons') has rules for disposing of the dead as safely as possible.^[1] Moreover, the Vīdēvdād requires that graves, and raised tombs as well, must be destroyed.^[1][10]

To preclude the pollution of the sacred elements: earth (zām), water (āpas), and fire (ātar), the bodies of the dead are placed at the top of towers and there exposed to the sun and to scavenging birds and necrophagous animals such as wild dogs.^[1][2][3] Thus, as an early-20th-century Secretary of the Mumbai Parsi community explained: "putrefaction with all its concomitant evils... is most effectually prevented."^[12]

Modern-day towers, which are fairly uniform in their construction, have an almost flat roof, with the perimeter being slightly higher than the centre. The roof is divided into three concentric rings: the bodies of men are arranged around the outer ring, women in the second ring, and children in the innermost ring. The ritual precinct may be entered only by a special class of pallbearers, called nusessalars, from the Avestan: nasa a salar, consisting of the word elements, -salar ('caretaker') and nasa- ('pollutants').

Once the bones have been bleached by the sun and wind, which can take as long as a year, they are collected in an ossuary pit at the centre of the tower, where—assisted by lime—they gradually disintegrate, and the remaining material, along with rainwater run-off, seeps through multiple coal and sand filters before being eventually washed out to sea.^[13][14]

The precipitous decline in the vulture population in India due to poisoning has led the Parsi community to explore alternatives to standard dakhmas.^[15]

In the Iranian Zoroastrian tradition, the towers were built atop hills or low mountains in locations distant from population centres. In the early 20th century, Iranian Zoroastrians gradually discontinued their use and began to favour burial or cremation.^[16]

The decision to change the system was accelerated by three considerations: the first problem arose with the establishment of the Dar ul-Funun medical school. Since Islam considers dissection of corpses as an unnecessary form of mutilation, thus forbidding it,^[17] there were no corpses for study available through official channels. The towers were repeatedly broken into, much to the dismay of the Zoroastrian community.^{[citation needed]} Secondly, while the towers had been built away from population centres, the growth of the towns led to the towers now being within city limits.^[16] Finally, many of the Zoroastrians found the system outdated.^[16] Following long negotiations between the anjuman societies of Kerman, and Tehran, the latter gained a majority and established a cemetery some 10 kilometres (6.2 mi) from Tehran at Ghassr-e Firouzeh (Firouzeh's Palace). The graves were lined with rocks and plastered with cement to prevent direct contact with the earth. In Kerman, older orthodox Zoroastrians continued to maintain a tower for a few years after a cemetery was built. Yazdi Zoroastrians continued using the Tower of Silence until the city asked them to close it in 1974.^[18]

Following the rapid expansion of the Indian cities, the squat buildings are today in or near population centres, but separated from the metropolitan bustle by gardens or forests. In Parsi Zoroastrian tradition, exposure of the dead is also considered to be an individual's final act of charity, providing the birds with what would otherwise be destroyed.

In the late 20th century and early 21st century the vulture population on the Indian subcontinent declined (see Indian vulture crisis) by over 97% as of 2008, primarily due to diclofenac poisoning of the birds following the introduction of that drug for livestock in the 1990s,^[19][20] until banned for cattle by the Government of India in 2006. The few surviving birds are often unable to fully consume the bodies.^[21] In 2001, Parsi communities in India were evaluating captive breeding of vultures and the use of "solar concentrators" (which are essentially large mirrors) to accelerate decomposition.^[22] Some have been forced to resort to burial, as the solar collectors work only in clear weather. Vultures used to dispose of a body in minutes, and no other method has proved fully effective.

The right to use the Towers of Silence is a much-debated issue among the Parsi community. The facilities are usually managed by the anjumans, the predominantly conservative local Zoroastrian associations. These usually having five priests on a nine-member board. In accordance with Indian statutes, these associations have domestic authority over trust properties and have the right to grant or restrict entry and use, with the result that the associations frequently prohibit the use by the offspring of a "mixed marriage", that is, where one parent is a Parsi and the other is not.^[23]

The towers remain in use as sacred locations for the Parsi community,^[24] though non-members may not enter them.^[25] In Mumbai visitors are shown a model of a tower. Organized tours can be taken to the site.^[26][27]

• The towers are uniform in their construction.
• The roof of the tower is lower in the middle than the outer and is divided into three concentric circles.
• The dead bodies are placed on stone beds on the roof of the tower and there is a central ossuary pit, into which the bodies fall after being eaten by vultures.
• The bodies disintegrate naturally assisted with lime and the remaining is washed off by rainwater into multiple filters of coal and sand, finally reaching the sea.

• Burial tree
• Disposal of human corpses – Burial methods
• Fire temple, Zoroastrian place of worship
• Seth Modi Hirji Vachha, builder of the first (Mumbai) dakhma (1672)
• Sky burial
• Vāyu-Vāta, air (vāyu) as a sacred element; the Zoroastrian divinity of wind
• Natural Burial

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