Archaeological Research & Excavations at Keem Bay, Achill Island (2009-16)


The Keem Bay Project (2009 to present) is an AAFS research strand focused on the fascinating post-medieval settlement at Keem Bay Achill Island. The project is making important contributions to our understanding of household and material culture in pre-Famine Mayo, as well as to the dating and character of rundale settlement in Ireland.

Keem is a sheltered valley on the western-most tip of Achill Island. The first-edition OS map (1838) shows a substantial clustered settlement of 40 buildings in the valley, surrounded by a large area of enclosed cultivation ridges. Ethnographic and historical evidence suggests that Keem was a seasonally occupied settlement associated with transhumance, although the archaeological evidence is not so clear. Writing in 1839 Ceasar Otway, a Protestant clergyman from Tipperary noted that Keem was 

‘only inhabited in summer …  the owners of the village  … have other houses in a distant part of the island, where they spend the winter and spring; thence they come when their oats and potatoes are planted and spend the summer months, herding their cattle on these heights, and leading a pastoral life (1839, 399-401).

This assertion was echoed by later ethnographic work undertaken by O’Kelly in the 1940s, who reported that Keem was a booley settlement used by the people of Slievemore (O Moghrain and O Duilearga 1943, 169).

Keem shown on A Maritim (sic) Survey of Ireland and the West of Great Britain taken by Order of the Right Honourable The Lords Commissioners of Admiralty in two volumes by Murdoch MacKenzie (1776).

In 2009 the AAFS began a programme of excavation at the site of the relict village of Keem with the aim of investigating the character of the settlement. The village was cleared in the 1850s, probably by Charles Cunningham Boycott, and little remains of the village today apart from a series of low grassy mounds. The footprint of about fourteen buildings can be discerned at the site. The 2009 excavation, directed by Theresa Bolger, targeted the largest footprint, Building 3. Bolger’s excavation was finished by Stuart Rathbone in 2015. Building 3 proved to be a small sub-rectangular dwelling with neatly constructed dry stone walls. The curved corners incorporated particularly large boulders, presumably placed to reinforce these natural weak points in the building. It measured 8.75m by 4.7m externally and just 6.66m by 2.8m internally. It was divided into two compartments, separated by a stone lined cross drain, with a larger living compartment with a hearth on one side and a smaller compartment on the other which was probably used to house animals. The building conforms to many of the characteristics of the classic byre dwelling with humans living at one end and animals at the other (see O Danachair 1964).

House 3 at Keem was excavated between 2009 and 2015.

Prior to the excavation one of the big questions about the settlement at Keem Bay regarded how it should be interpreted, as the remains of a small permanently occupied village or as a large transhumant seasonally occupied booley village. The excavations at Building 3 have provided important information that relates to that question. Building 3 appears to be a permanently occupied dwelling, that conforms to descriptions of early 19th-century houses on Achill, and crucially the division of the building into a byre dwelling arrangement is not what would be expected from a house only occupied during the summer months when animals could happily be kept outside.

In 2016 work continued at Keem with the excavation of Building 4, a mounded footprint located immediately SW of Building 3.  Both buildings were orientated on the same NW-SE axis. Building 4 was an oblong structure defined by thick earth and sod walls revetted by dry-stone facing on the interior and exterior. It was 2.5m wide by 4.8m long internally. It had straight walls with noticeably rounded corners, both inside and out. The building had a diagonal drain that ran N-S across its NW end and exited at the door, in the SW wall of the building. Most interesting the building had not one, but three hearths, that seem to have been used sequentially. This is perhaps the most significant finding from Building 4 and it suggests that the dwelling was occupied episodically. The artefacts from the building indicate a late 18th to early-19th century date, similar to Building 3.

Post-excavation analysis of both sites is ongoing. In 2017 we plan to return to Keem to excavate a third building in the settlement.

Sketchfab model of Building 4. Click on the image to explore the 3D model.

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