The Poulnabrone dolmen (Irish: Poll na Brón, meaning "Hole of the Quernstone") is a large stone structure, also called a cromlech, located in the Burren, County Clare, Ireland. It stands on one of the region’s highest and most remote areas. The monument includes three upright stones that support a heavy flat stone on top. It was built during the early Neolithic period, around 3800 to 3200 BC. While not the largest of its kind, it is one of the most well-known among the approximately 172 dolmens in Ireland.
The dolmen was built on a unique landscape made of limestone that formed about 350 million years ago. Neolithic farmers constructed it, possibly for religious ceremonies, to mark territory, or as a place to bury people together. Today, only the "stone skeleton" of the original monument remains. Originally, the structure would have been covered with soil, and the top stone was likely covered by a pile of rocks called a cairn.
When archaeologists excavated the site in 1986 and 1988, they found about 33 human remains, including those of adults, children, and a baby from the later Bronze Age, buried beneath it. They also discovered stone and bone items that were placed with the dead during burial. These remains and objects were buried over a 600-year period from 3800 to 3200 BC.
Name
Poulnabrone is a way of spelling the sounds of the Irish name Poll na Brón. The word "Brón" comes from the Irish word "bró," which means a quern, a tool used to grind grain. The name "Poll na Brón" translates to "Hole (or Pool) of the Quernstone." It is sometimes translated as "Hole of Sorrows," which is written as "Poll na mBrón" in Irish.
Origin and purpose
Poulnabrone dolmen is located on a small, round hill about 10 meters (33 feet) wide. The site is east of the Poulanine and Glensleade valleys, with the rocky Baur and Poulnabrucky hills beyond it. About 54 meters (177 feet) to the northeast of the site, the land rises into rough, uneven rocky areas. The location was hard to reach when it was built and may have been used as a place for rituals during the Bronze Age.
The monument might also have acted as a marker to show the boundaries of an area during the Neolithic period. It was placed in a spot visible from all directions and near an important north-south path connecting Ballyvaughan Bay to the area where Kilnaboy village is now located. It is possible that local people built the dolmen to mark the northern edge of their land and later used it for burials over many generations.
Unlike most Irish dolmens, but like those found in County Clare, the large flat stone on top of the dolmen slopes upward toward the west.
Description
Poulnabrone dolmen has a large flat capstone (or table-stone) that is held up by two pillar stones on each side. These pillar stones form a chamber that becomes narrower as it moves east. Two portal stones at the lower end of the structure mark the entrance to the tomb.
The capstone is shaped like a trapezoid and measures 3.9 meters (13 feet) in length. It ranges between 2 meters (6 feet 7 inches) and 3 meters (9.8 feet) in width and is 0.3 meters (1 foot) thick. It is supported by two pairs of stones on the north and south sides. Over time, some of these stones have fallen. The capstone, along with the north and south pillars, creates a chamber that is 2.8 meters (9 feet 2 inches) long. The chamber narrows toward the east because the supporting stones are at different heights. These side stones are attached directly to the limestone bedrock, meaning they were not taller during the Neolithic period.
The portal stones are placed on the lower edges of the capstone, indicating the tomb’s entrance. A threshold stone (or sill) lies across an east-west crack in front of the portal stones.
The cairn, or mound of stones, extends about 3 meters (9.8 feet) from the chamber.
Radiocarbon dating suggests the tomb was used as a burial site between 3800 and 3200 BC. Artifacts from the site are now displayed at the Clare Museum in Ennis, loaned from the National Museum of Ireland.
Poulnabrone is the largest portal tomb in Ireland after Brownshill Dolmen in County Carlow.
Excavations
A crack at the base of the eastern portal stone was found during a survey in the 1950s. By the early 1980s, the crack had grown so much that it was feared it might cause the tomb to become unstable. Two conservation projects were carried out in 1986 and 1988, and were managed by Ann Lynch, a Senior Archaeologist at the National Monuments Service.
At the time of the first excavation, the dolmen was located on private land. To allow the work to proceed, the Irish state took responsibility for protecting the site in 1986. The 1986 excavation focused on the chamber and cairn. The main goal was to lift the capstone to reduce pressure on the damaged portal stone. This was done by building a wooden pyramid-shaped structure, which protected the archaeologists working under the capstone and provided the strength needed to raise the capstone enough to repair the portal and fully explore the chamber.
During the excavations, the remains of about 33 people were found inside the chamber. Items such as pottery, a stone axe, jewelry made from bone and quartz crystals, and weapons were also discovered in different areas.
The human remains were studied by Dr. Barra O'Donnabhain (University College Cork) and Dr. Mara Tesorieri. From about 6,000 bone fragments, it was determined that at least 28, but likely around 36 people, were buried within the monument. It was difficult to tell the remains of each person apart, but Lynch estimated that at least 17 were children or younger, and there was roughly an equal number of males and females. 4,169 bones could be identified as specific parts of the body, while 486 were loose teeth. Almost all of the identified adults were under 30 years old. These people lived between 3800 and 3200 BC and were likely part of a Neolithic community.
In most cases, the condition of the remains suggested lives of hard physical labor, with lifespans ending before the age of 30. Only one person lived past 40 years. Wear on the chest and spine of some individuals showed they carried heavy loads on their heads and backs. Many bones showed signs of arthritis in the upper body, and the children’s teeth showed signs of illness and poor nutrition. Dental evidence, such as worn upper front teeth, suggested a diet high in plant-based foods and low in animal protein.
The remains of two individuals showed signs of violent injuries. A young or middle-aged male had a flat, oval-shaped wound on the left side of his skull, likely caused by a small blunt object. The position of the wound suggests it may have come from a projectile, such as a sling. The wound healed completely without infection. Another person had a triangular stone projectile tip embedded in their right hip bone, which may have been shot from behind. Although the injury itself was not fatal, the lack of healing suggests the person suffered other fatal injuries during the same event.
The remains of a six-month-old baby with Down syndrome were found at the site. This is believed to be the earliest known case of Down syndrome discovered. Evidence suggests the infant was breastfed before dying.
Some bodies were left elsewhere to decompose, likely in a protected area, as none showed signs of animal teeth marks. Some had burn marks, suggesting they may have been ritually burned before being placed there.
Between approximately 1750 and 1420 BC (during the Irish Bronze Age), an infant was buried just outside the entrance of the tomb.
Most of the pottery was found inside the main chamber, with smaller pieces in the portico and cairn. The pottery is very broken and small, with most pieces being described as "crumbs or fragments" by archaeologist Anne Brindley. It is unclear how many original objects they came from. While few pieces have unique features, some fragments are linked to the early Western Neolithic tradition (c. 3750–3600 BC), based on the type of material used. A few pieces had partially intact edges or decorations.
Tourism and preservation
The site remains in good condition, even though many people visit it each year.
In 2007, a large parking area was built by Clare County Council to solve traffic problems caused by cars and buses parking on a narrow road. This decision was based on a 2005 estimate that predicted 200,000 visitors each year. In 2007, disagreement occurred when Lynch asked for fewer visitor facilities to protect the spiritual character of the landscape near the tomb.