Wheelhouse (archaeology)
Encyclopedia
In archaeology
Archaeology
Archaeology, or archeology , is the study of human society, primarily through the recovery and analysis of the material culture and environmental data that they have left behind, which includes artifacts, architecture, biofacts and cultural landscapes...

, a wheelhouse is a prehistoric
Prehistory
Prehistory is the span of time before recorded history. Prehistory can refer to the period of human existence before the availability of those written records with which recorded history begins. More broadly, it refers to all the time preceding human existence and the invention of writing...

 structure from the Iron Age
Iron Age
The Iron Age is the archaeological period generally occurring after the Bronze Age, marked by the prevalent use of iron. The early period of the age is characterized by the widespread use of iron or steel. The adoption of such material coincided with other changes in society, including differing...

 found in Scotland
Scotland
Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

. The term was first coined after the discovery of a ruined mound in 1855. The distinctive architectural form related to the complex roundhouse
Roundhouse (dwelling)
The roundhouse is a type of house with a circular plan, originally built in western Europe before the Roman occupation using walls made either of stone or of wooden posts joined by wattle-and-daub panels and a conical thatched roof. Roundhouses ranged in size from less than 5m in diameter to over 15m...

s, constitute the main settlement type in the Western Isles, in the closing centuries BC. A total of 62 sites have now been identified in the Northern
Northern Isles
The Northern Isles is a chain of islands off the north coast of mainland Scotland. The climate is cool and temperate and much influenced by the surrounding seas. There are two main island groups: Shetland and Orkney...

 and Western Isles, and on the north coast of Caithness
Caithness
Caithness is a registration county, lieutenancy area and historic local government area of Scotland. The name was used also for the earldom of Caithness and the Caithness constituency of the Parliament of the United Kingdom . Boundaries are not identical in all contexts, but the Caithness area is...

 and Sutherland
Sutherland
Sutherland is a registration county, lieutenancy area and historic administrative county of Scotland. It is now within the Highland local government area. In Gaelic the area is referred to according to its traditional areas: Dùthaich 'IcAoidh , Asainte , and Cataibh...

.

Amateur enthusiasts did some excavation in the 19th century, but professional examination of the sites did not begin until the 1930s, when digs were undertaken at Jarlshof
Jarlshof
Jarlshof is the best known prehistoric archaeological site in Shetland, Scotland. It lies near the southern tip of the Shetland Mainland and has been described as "one of the most remarkable archaeological sites ever excavated in the British Isles"...

 and Gurness. No work of a modern standard was done in the Hebrides
Hebrides
The Hebrides comprise a widespread and diverse archipelago off the west coast of Scotland. There are two main groups: the Inner and Outer Hebrides. These islands have a long history of occupation dating back to the Mesolithic and the culture of the residents has been affected by the successive...

 until 1946 at Clettreval on North Uist
North Uist
North Uist is an island and community in the Outer Hebrides of Scotland.-Geography:North Uist is the tenth largest Scottish island and the thirteenth largest island surrounding Great Britain. It has an area of , slightly smaller than South Uist. North Uist is connected by causeways to Benbecula...

.

Sometimes referred to as "aisled roundhouses
Atlantic roundhouse
In archaeology, an Atlantic roundhouse is an Iron Age stone building found in the northern and western parts of mainland Scotland, the Northern Isles and the Hebrides.-Types of structure:...

" their characteristic features include an outer wall within which a circle of stone piers (bearing a resemblance to the spokes of a wheel) form the basis for lintel arches supporting corbel
Corbel
In architecture a corbel is a piece of stone jutting out of a wall to carry any superincumbent weight. A piece of timber projecting in the same way was called a "tassel" or a "bragger". The technique of corbelling, where rows of corbels deeply keyed inside a wall support a projecting wall or...

led roofing with a hearth at the hub. About a third are double-walled. They range in diameter from 4  metres to 11.5 metres. Those sites that have been dated tend to fall within the period 25 BC to 380 AD. In the Northern Isles, 72% are found in association with broch
Broch
A broch is an Iron Age drystone hollow-walled structure of a type found only in Scotland. Brochs include some of the most sophisticated examples of drystone architecture ever created, and belong to the classification "complex Atlantic Roundhouse" devised by Scottish archaeologists in the 1980s....

 sites, and they are of a later date than these towered structures in all cases. No sites in the west have such an association, an as yet unresolved enigma. The majority are dug into the landscape and only their thatched roofs would have been visible above the ground — although these would have been 6 metres or more in height. Other examples were built above ground, such as Clettraval and Bagh nam Feadag (on Grimsay
Grimsay
Grimsay is a tidal island in the Outer Hebrides of Scotland.Grimsay is the largest of the low-lying stepping-stones which convey the Oitir Mhòr causeway, a five mile arc of single track road linking North Uist and Benbecula via the western tip of Grimsay...

).
Many sites incorporate animal burials beneath the floor, the most common bones being those of young lambs. Other bone deposits include the heads of a human and a Great Auk
Great Auk
The Great Auk, Pinguinus impennis, formerly of the genus Alca, was a large, flightless alcid that became extinct in the mid-19th century. It was the only modern species in the genus Pinguinus, a group of birds that formerly included one other species of flightless giant auk from the Atlantic Ocean...

 at Cnip on Lewis
Lewis
Lewis is the northern part of Lewis and Harris, the largest island of the Western Isles or Outer Hebrides of Scotland. The total area of Lewis is ....

, and sixty bone burials including cattle, sheep and pig at Sollas in North Uist. Five sites include menhir
Menhir
A menhir is a large upright standing stone. Menhirs may be found singly as monoliths, or as part of a group of similar stones. Their size can vary considerably; but their shape is generally uneven and squared, often tapering towards the top...

s and fifteen a red and black mortar. These features tends to support the hypothesis that the primary purpose of these buildings was ritualistic. Confusingly therefore, "wheelhouses" are neither wheels, nor perhaps houses.

The highly restricted nature of their geographical locations suggests that they may have been contained within a political or cultural frontier of some kind. The co-incidence of their arrival and departure being associated with the period of Roman influence in Scotland
Scotland during the Roman Empire
Scotland during the Roman Empire encompasses a period of protohistory from the arrival of Roman legions in c. AD 71 to their departure in 213. The history of the period is complex: the Roman empire influenced every part of Scotland during the period, however the occupation was neither complete nor...

is a matter of ongoing debate.
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