Giants’ Wine Jars or Funerary Urns? The Mystery of Laos’ Ancient Plain of Jars

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What are all those massive stone jars for? Photo: Jakub Hałun

Nestled in the mountains of northern Laos lies one of the most enigmatic archaeological sites in Southeast Asia – the Plain of Jars. This prehistoric landscape consists of thousands of ancient stone jars scattered across the upland valleys and foothills of the Xiangkhouang Plateau.

Those jars have had archaeologists scratching their heads. Carved from solid stone, they vary from 1-3 meters (3-10 ft) in height and width, with taller jars weighing up to 30 tons. Most have cylindrical shapes with wide bottoms and smaller tops, suggesting they may have had lids, though few have been found intact. One jar even contains an intricate carved relief depicting a mysterious “frogman” figure.

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Local Hmong women and girls climb on one of the jars, demonstrating their massive proportions. Photo: Oliver Spalt

So what was the purpose of these massive stone vessels? Local legends claim they were used to brew rice wine for ancient celebrations by a race of giants. Another story suggests the jars were crafted from a unique mixture of natural materials, including clay and animal products, and fired in a nearby cave that served as a giant kiln.

However, research over the last century points to a more somber explanation – that the jars are ancient burial vessels. French archaeologists in the 1930s found remains of teeth, bones, ceramics, and decorative beads within and around the jars, indicating they were part of funeral rituals. Some scholars theorize the jars acted as “distilling vessels” to aid the transition of souls to the afterlife, akin to practices of Thai and Cambodian royalty.

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Jar with a lid. Was it used for a burial? Photo: Chaoborus

The jars could as well have served as vessels for secondary burials, where bodies were exposed to the elements until only bones remained for collection and proper interment. This theory aligns with some burial mounds discovered close by.

Radiocarbon dating reveals the jars were placed between 1240-660 BC, though burials continued for over a millennium after, with the extended timeframe adding another layer of complexity to the mystery. Who constructed them and why they chose this remote mountainous region remains unknown.

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The jars were created and installed between 1240-660 BC. Photo: Anne Murray

Adding to the mystery, it’s unclear if the jars were carved locally or brought in from quarry sites up to 8 km away. Over 90 jar sites have been identified, with the largest containing nearly 400 massive jars.

Many jars show signs of looting and damage from bombing during the Vietnam War when the area was heavily bombed by the United States Air Force. Sadly, millions of unexploded ordnance still litter the landscape, posing a constant threat to local communities.

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    Over 90 jar sites have been identified, with the largest containing nearly 400 massive jars. Photo: Mattun0211

    Today, the Plain of Jars stands as one of the most important prehistoric sites in Southeast Asia, inscribed as a UNESCO World Heritage site in 2019. Visiting provides a surreal experience, wandering among these ancient stone giants amid the peaceful valleys and hills.

    Sources: 1, 2, 3

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    Written by Tamás Varga
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    A sociologist and English major by degree, I've worked in the area of civil society & human rights and have been blogging in the fields of travel, nature & science for over 20 years.

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