The Portal Tomb of Ballybrack (Irish: An Baile Breac) in the southeast of Dublin, Ireland, is a well-preserved megalithic structure. It is located within a residential area, about 20.0 meters from a road, approximately one kilometer east of Dublin Bay and the Irish Sea. Situated between Cromlech Fields and the busy Shanganagh Road, the site is marked as a “Dolmen” on the OS map. During the construction of houses in the area, a small excavation was carried out to determine the extent of the structure, but no artifacts were uncovered.
Portal tombs are megalithic structures found on the British Isles, characterized by two equally tall, upright stones with a door stone in between, forming the front of a chamber partially covered by a massive capstone. The capstone of this tomb, made of quartz, measures 2.2 meters in length, 2.05 meters in width, and 1.2 meters in thickness, weighing approximately 40 tons, with an almost straight underside. The portal stones are 1.55 meters and 1.4 meters high. There is no door stone or end stone. The entrance to the chamber is located on the eastern side.
Nearby, there is also the Passage Tomb of Ballybrack. In County Kerry, you can find the Stone Box of Ballybrack.
