Some cultures place the dead in tombs of various sorts, either individually, or in specially designated tracts of land that house tombs. Burial in a graveyard is one common form of tomb. In some places, burials are impractical because the ground water is too high; therefore tombs are placed above ground, as was the case in New Orleans, Louisiana. Elsewhere, a separate building for a tomb is usually reserved for the socially prominent and wealthy. Especially grand above-ground tombs are called mausoleums. Other buildings used as tombs include the crypts in churches; burial in these places is again usually a privilege given to the socially prominent dead. In more recent times, however, this has often been forbidden by hygiene laws.
Burial was not always permanent. In some areas, burial grounds needed to be re-used because of limited space. In these areas, once the dead have decomposed to skeletons, the bones are removed; after their removal they can be placed in an ossuary.
"Burial at sea" means the deliberate disposal of a corpse into the ocean, wrapped and tied with weights to make sure it sinks. It is a common practice in navies and sea-faring nations; in the Church of England, special forms of funeral service were added to the Book of Common Prayer to cover it. Science fiction writers have frequently analogized with "Burial in space".
St. Joseph's Chapel Mausoleum at Mount Olivet Cemetery in Key West (rural Dubuque), Iowa. This mausoleum has traditional mausoleum crypts as well as columbarium niches for cremated remains.Cremation, also, is an old custom; it was the usual mode of disposing of a corpse in ancient Rome. Vikings were occasionally cremated in their longships, and afterwards the location of the site was marked with standing stones. In recent years, despite the objections of some religious groups, cremation has become more and more widely used. Orthodox Judaism and the Eastern Orthodox Church forbid cremation, as do most Muslims. Orthodox Judaism forbids cremation according to Jewish law (Halakha) believing that the soul of a cremated person cannot find its final repose. The Roman Catholic Church forbade it for many years. But since 1963 the church has allowed it so long as it is not done to express disbelief in bodily resurrection. The church specifies that cremated remains are either buried or entombed. They do not allow cremated remains to be scattered or kept at home. Many Catholic cemeteries now have columbarium niches for cremated remains, or specific sections for those remains. Some denominations of Protestantism allow cremation, the more conservative denominations generally do not.
Hindus consider the funeral as the final "samskar" or ritual of life. Cremation is generally mandatory for all Hindus, except for saints and children under the age of 5 years. Cremation is seen as the only way in which all the five elements of fire, water, earth, air and space would be satisfied by returning the body to these elements as after cremation the ashes are poured into the sacred river Ganges or into the sea. After death the body of the deceased is placed on the ground with the head of the deceased pointing towards south which is considered the direction of the dead. The body is anointed with sacred items such as sandalwood paste and holy ashes, tulsi (basil) leaves and water from the river Ganges. The eldest son would wisper "Om namah shivay" or "Om namo bhagavate vasudevaya" near the ear of the deceased. An oil lamp is lit besides the deceased and chapters from the holy Bhagavad Gita or Garud Purana are recited. Traditionally the body has to be cremated within 24 hours after death, as keeping the body longer is considered to lead to impurity and hinder the passage of the dead to afterlife. Hence before cremation as the body lies in state, minimal physical contact with the body is observed. A priest is called in to lead the formal religious rituals, after which the body is taken to the cremation ground, where the eldest son normally lights the funeral pyre, this act is considered to be the most important duty of a son as it is believed that he leads his parents from this world into moksha. Immediately after the cremation, the family members of the deceased all have to take a purifying bath and observe a 12-day mourning period. This mourning period ends on the morning of the thirteenth day on which a Shraddh ceremony is conducted in which offerings are given to ancestors and other gods in order to grant liberation or moksha to the deceased.
Recently a new method of disposing of the body, called promession or an Ecological funeral, has been patented by a Swedish company. Its main purpose is to return the body to soil quickly while minimizing pollution and resource consumption.
Rarer forms of disposal of the dead include excarnation, where the corpse is exposed to the elements. This was done by some groups of Native Americans; it is still practiced by Zoroastrians in Bombay, where the Towers of Silence/Daxmas allow vultures and other carrion eating birds to dispose of the corpses. Zoroastrianism believes that fire is sacred and should not be defiled by cremating a human body. It is also practiced by some Tibetan Buddhist monks where it is sometimes called Sky burial.
Cannibalism is also practiced post-mortem in some countries. The practice has been linked to the spread of a prion disease called kuru.
Mummification is the drying of bodies to preserve them. The most famous practitioners of mummification were ancient Egyptians: many nobles and high-ranked bureaucrats of the old Egyptian kingdom had their corpses embalmed and stored in luxurious sarcophagi inside their funeral mausoleum or, in the cases of some Pharaohs, a pyramid.
From Wikipedia