Brennanstown Dolmen

The Brennanstown dolmen (also known as Glendruid or Druid’s Altar) was built between 4000 and 2500 BC during the Neolithic period. It is a Portal Tomb located in the townland of Brenanstown, in the southern part of County Dublin, Ireland.

Brenanstown Dolmen

The Dolmen of Brennanstown (also known as Glendruid or Druid’s Altar) was built between 4000 and 2500 BC during the Neolithic period. It is a Portal Tomb located in the townland of Brenanstown (Irish: Baile Uí Bhraonáin) in a hollow, close to Brennanstown Road, in the southern part of County Dublin near Bray, in the Glen Druide valley, approximately 1.7 km south of Cabinteely in the Republic of Ireland.

Portal tombs are megalithic structures found on the British Isles, characterized by two equally tall, upright stones with a doorstone in between, forming the front of a chamber partially covered by a massive capstone.

The Dolmen of Brenanstown, made of granite, has undergone some restoration work on its rear. The capstone, rising to a height of 3.5 meters at the front, measures about 4.4 meters in length and width and weighs approximately 45 tons. The capstone has the typical tapered form seen in Irish Portal Tombs, giving the dolmen the appearance of a bird taking flight. On the upper surface of the end stone, there are two deep grooves with channels leading to the sides, a feature observed in several Irish monuments.

Behind the tomb, there is a rectangular arrangement of stones that may have belonged to a second chamber, making it one of only two double portal tombs.

The Portal Tomb bears some resemblance to the nearby Portal Tomb of Kiltiernan.

  • References

    image: https://commons.wikimedia.org/wiki/File:Brennanstown_-_Portal_Tomb.jpg

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