People began deliberately preserving their dead at least 7,000 years ago, and possibly earlier. The oldest known embalmed remains come not from Egypt, as most people assume, but from the Atacama Desert coast of South America, where the Chinchorro people were mummifying bodies roughly 2,000 years before the Egyptians started. From those ancient origins, embalming evolved through radically different cultures and chemistries until it became the formaldehyde-based process used in funeral homes today.
The Chinchorro: 7,000 Years Before Modern Embalming
The Chinchorro people lived along the coastline of what is now Chile and Peru from roughly 8000 BCE to 500 BCE. Their mummification practices had developed into a sophisticated art form by around 5050 BCE, making the earliest Chinchorro mummy about 7,000 years old. By some estimates, the broader tradition was well established by 7000 BCE.
Their methods were elaborate and surprisingly technical. Embalmers removed the organs and disassembled the body, then rebuilt it using an internal framework of reeds, sticks, and bone. Clay replaced the soft tissue of the face, organs, and even genitalia. The skin was dried, possibly using hot sand or coals, then coated with a black manganese ash paste. Over thousands of years, the coating materials shifted to red ochre and then mud. Ceremonial helmets and headdresses made of clay sat atop wigs fashioned from human hair, some stretching two feet long.
One remarkable detail: unlike Egyptian mummification, which was largely reserved for royalty and the wealthy, Chinchorro embalming was practiced across all social classes. Children, infants, and adults all received the same careful preservation. The tradition eventually faded around the first century BCE.
Ancient Egypt Refined the Process
Egyptian mummification began around 2600 BCE, during the Fourth and Fifth Dynasties, and continued for over 2,000 years into the Roman Period. The technique that most people picture when they think of embalming, with wrapped linen and golden sarcophagi, reached its peak during the New Kingdom (roughly 1570 to 1075 BCE). This was the era of Tutankhamun and other famous pharaohs.
The core chemistry was natron, a naturally occurring salt with powerful drying properties. After removing the internal organs, embalmers packed the body cavity with natron and covered the exterior with it as well. The salt drew out all moisture over a period of weeks. Once the body was completely desiccated, workers washed off the natron, wrapped the remains in linen, and applied resins. The dry desert climate helped, but it was the natron that did the real preservation work, creating conditions too hostile for the bacteria that cause decay.
Preservation in Ancient China
China developed its own preservation philosophy, relying on sealed burial environments rather than chemical treatment of the body itself. The most famous example is Lady Dai of the Western Han Dynasty, discovered in 1971 during construction of an air-raid shelter near Changsha. When archaeologists opened her innermost coffin, buried roughly 20 meters underground, her body showed no signs of decomposition despite being over 2,100 years old.
The coffin was filled with a liquid containing cinnabar, a mercury-based mineral. Layers of charcoal absorbed surrounding moisture, while kaolin clay sealed the burial chamber so completely that no water or air could reach the body. This created an oxygen-free environment that simply halted decomposition. It was less embalming in the traditional sense and more a feat of engineering: controlling the burial conditions so precisely that decay never had a chance to begin.
Renaissance Anatomists and Early Chemistry
For most of medieval Europe, embalming was rare. Bodies were buried quickly or, for royalty, packed with herbs and spices. That changed in the 15th through 18th centuries as anatomists needed to preserve cadavers long enough to study them. This period turned embalming from a funerary ritual into a chemical science.
Early recipes read like a alchemist’s shopping list. Anatomists experimented with turpentine, lavender oil, camphor, rosin, vinegar, aloe, table salt, and ethyl alcohol (called “aqua vitae”). One Italian method from 1629 involved removing the organs, salting the body, rubbing it with wax and cedar oil, then wrapping it in wax-coated paper. A particularly ambitious German formula called for 60 pounds of crushed oak bark, 50 pounds of alum, 100 pounds of salt, 1,500 pounds of alcohol, and 800 pounds of vinegar, all poured into a lead box with the body.
By the 18th century, English surgeon John Hunter was injecting arteries with mixtures of turpentine tinted with cinnabar. Others used mercury oxide mixed with coagulated pig blood. Arsenic became the go-to preservative for a time because it was cheap and effective, though its toxicity would eventually force a reckoning.
The Civil War Changed Everything
Modern embalming as practiced in North America traces directly to the American Civil War. Before the 1860s, embalming was an obscure medical procedure. The war created a sudden, massive demand: families wanted their dead soldiers shipped home for a proper burial, but the logistics of transporting unembalmed remains across long distances were grim. Railroads began refusing to carry unembalmed corpses because of the overwhelming smell of decomposition.
Dr. Thomas Holmes, a former coroner’s surgeon from New York City, had spent the 1850s refining arterial embalming techniques originally developed by French researchers. When the war began, he opened an embalming office in Washington, D.C., and over four years he personally prepared about 4,000 bodies for transport home. His method was straightforward: pump a chemical solution into the body through the arteries, replacing blood with preservative fluid that prevented decay long enough for the journey.
Holmes got his big break through personal connections. One of the war’s first casualties was Colonel Elmer Ellsworth, a friend of Abraham and Mary Lincoln. Holmes embalmed him for free. Mary Lincoln, upon viewing the body, remarked that Ellsworth appeared to be asleep. When the Lincolns’ young son Willie died in February 1862, they had Holmes embalm him too. Lincoln then offered Holmes a commission to embalm Union soldiers, effectively making arterial embalming a sanctioned military practice. The technique spread rapidly through the funeral industry after the war ended.
Formaldehyde Replaced Arsenic
For decades, arsenic was a primary ingredient in embalming fluid. It preserved tissue effectively, but it was a potent poison that contaminated soil around cemeteries and posed serious risks to embalmers handling it daily. German chemist August Wilhelm von Hofmann’s discovery of formaldehyde provided an alternative that would eventually take over the industry.
Formaldehyde works by chemically bonding proteins together. It inserts tiny molecular bridges between adjacent protein molecules, locking them in place so that bacteria and fungi cannot break them down. It also kills bacteria, fungi, and insects on contact. This combination of germ-killing and tissue-fixing properties made it ideal for preservation. By the early 1900s, U.S. states began banning arsenic from embalming fluids, and formaldehyde became the standard. It remains the primary active ingredient in embalming fluid today.
The Rise of Professional Funeral Science
As embalming became routine after the Civil War, the need for formal training followed. In 1882, the Cincinnati College of Mortuary Science opened as America’s first mortuary college, marking the shift from embalming as an informal trade learned through apprenticeship to a licensed profession with standardized education. State licensing requirements gradually followed, and by the early 20th century, embalming in the United States had become what it is now: a regulated practice performed by trained, certified professionals in dedicated facilities.
The full arc spans roughly 7,000 years, from Chinchorro artisans rebuilding bodies with reeds and clay to modern funeral directors using arterial injection systems. The underlying impulse has stayed constant across every culture and era: the desire to hold back decay and give the dead a dignified passage out of the world.