Kisimul Castle: The Fortified Seat of Clan MacNeil

Site at a Glance

Rating

★4.3

Popularity

Very Low

Country

United Kingdom

Primary era

Medieval

External website

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Eras represented

Medieval, Early Modern, Modern

Civilizations

Kingdom of Scotland

Site type

Military

Remains

Castle

History

Kisimul Castle is a medieval fortified house-tower in the United Kingdom, built on a rocky islet in Castlebay as the ancestral stronghold of Clan MacNeil on Barra. Its construction date is uncertain, although building analysis has proposed a later fifteenth-century origin and the earliest surviving documentary reference to the castle dates from 1549. The castle formed part of a defensive network intended to resist Scandinavian incursions, and its isolated position, freshwater wells, protected anchorage, and permanently stationed galley supported its military role.

Origins and medieval development

Tradition places the MacNeil settlement on Barra in the eleventh century, while documentary evidence confirms the clan’s presence there by the early fifteenth century. Later tradition attributes the foundation of Kisimul either to Naill de Barra, the clan’s twenty-first chief, around 1039, or to the period after Gilleonan MacNeil became the clan’s first lord in 1427. Neither tradition provides a certain construction date. The castle may have been preceded, or initially accompanied, by a chapel dedicated to Saint Cieran. This chapel may have been the first stone building within the enclosure, although its date and identification remain uncertain.

Major changes took place from the early to mid-fifteenth century. The keep, chapel, and a ceremonial building were incorporated into the enclosure, while later additions included raised walls, timber hoardings, and a relocated entrance. Further alterations continued from the late fifteenth through the seventeenth century. An extension of the Great Hall blocked the postern, a small secondary entrance, and another storey was added to the hall. These changes produced a complex fortified residence rather than a single tower.

Clan warfare and traditions

Kisimul was repeatedly besieged during clan warfare and family feuds but was never captured. One tradition says that MacNeil defenders deceived Viking attackers by displaying cattle hides marked with dog blood, making their supplies appear more plentiful than they were. Sixteenth-century Tatar pirates also failed to take the castle, as did officials who attempted to reach it in the seventeenth century.

Members of Clan MacNeil are said to have fought with Robert the Bruce, Robert I of Scotland, at Bannockburn in 1314, receiving lands in Kintyre as a reward. During the Jacobite rising of 1715, a movement supporting the exiled Stuart royal line, members of the clan fought for the cause. In 1745 the clan nominally supported Charles Edward Stuart, the Stuart claimant commonly called Bonnie Prince Charlie, but did not take part in the fighting. After the failed rising, the clan chief was imprisoned. In 1750, a spy reported that MacNeil of Barra might support another rising with 150 men.

Clan tradition also remembers Marion of the Heads, the second wife of MacNeil of Barra, as a notorious resident. She allegedly arranged the execution of her stepsons so that her own son would inherit. The story remains part of the castle’s historical associations, but it is presented as an allegation rather than a confirmed event.

Abandonment and restoration

After the union of the Scottish and English kingdoms, Kisimul’s strategic importance declined. Seeking greater comfort, the MacNeil chief stopped using it as his principal residence, and the castle was largely abandoned. An internal fire occurred in 1795. Barra and the castle were sold in the late 1830s to settle the chief’s debts.

During the following century, weather, fires, vandalism, and the removal of stone caused the abandoned castle to deteriorate. Vessels supplying salt for the fish-curing industry carried away stones as ballast, and some were later sold as paving in Glasgow. Fishing boats also discarded castle stones at sea when replacing ballast with catches.

Robert Lister MacNeil, the forty-fifth chief of Clan MacNeil and an architect, bought back the castle and most of Barra in 1937. Between 1938 and 1970 he reconstructed and restored Kisimul with the aim of recovering its eighteenth-century appearance. The work rebuilt the walls, keep, and internal buildings, and included a mortuary chapel beside the watchtower during the 1950s. Telephone and piped water were also provided to the island. The late-sixteenth-century ruins of the galley crew’s dwelling outside the castle were left unrestored. MacNeil died in 1970.

Historic Scotland placed the reconstructed castle in Category A in 1971. This is Scotland’s highest listed-building category, used for buildings of national or architectural importance. In 2000, the clan chief leased Kisimul to Historic Scotland for 1,000 years in return for an annual rent of one bottle of whisky and one pound. The arrangement placed management with the Scottish government body responsible for many historic monuments and supported the castle’s long-term preservation.

Excavations, building recording, and archival research in 2001 examined the courtyard, the keep basement, and the bottom of the pit prison. They revealed sporadic prehistoric occupation during the Neolithic or Bronze Age, although its character and duration could not be established. Finds included pottery, cereals, flint, animal bone, shell, building debris, and a decorative gold object from the early eleventh century. A particularly fine flint blade indicates human use of the island thousands of years before the present castle.

Remains

Kisimul occupies almost the entire surface of a rocky islet about 180 metres from Barra at its nearest point. The islet is formed of Precambrian Lewisian gneiss, very ancient metamorphic bedrock associated with northwestern Scotland. At high tide, the surrounding waters reach the enclosure walls, and access is by boat. A slipway accommodates and hauls up small boats. The castle’s name appears in English as Kisimul Castle and in Scottish Gaelic as Caisteal Chiosmuil. Historical spellings include Kiessimul, Kiessamul, Chisimul, and Kismull Castle. The name gave rise to Castlebay and is also rendered as the “Castle in the Sea.”

Enclosure and defences

The outer walls form an irregular five-sided enclosure measuring approximately 20 to 30 metres across. They average about 1.2 metres in thickness and reach approximately 2.1 metres on the eastern side facing Barra. The walls rise about 15 metres, are topped with crenellations, and carry a wall walk, a passage along the top of a defensive wall, slightly less than 50 centimetres wide. Intermediate gutter holes show that the walls were heightened after their original construction. Putlog holes, openings that supported horizontal scaffolding or timber beams, may have held timber hoardings, or galleries attached to the walls. Their position does not align with the wall walk, so they may instead have supported additional walking or exercise space.

A small watchtower occupies the northern corner, the only rounded external corner of the enclosure. Its ground level contains a prison and latrines, while the first floor holds a guards’ room. Two small rounded projections on the outer northwestern face may have strengthened the defences, and the eastern and western corners have raised crenellations. The gate lies on the southeastern side near the keep. An iron grille and a machicolation, a projecting defensive structure with openings for dropping objects or liquids onto attackers, protect the entrance. The landing place is also on the southeastern side of the islet.

Keep and courtyard buildings

The keep

The keep occupies the southeastern corner of the enclosure. Its slightly splayed base measures just under 9 metres in length and just over 8 metres in width, with walls about 1.8 metres thick. A machicolation projects from the top of its northern wall facing Castlebay. The original entrance was on the first floor and could be reached by a removable bridge or ladder. It has been blocked and is now approached by a stair, while the present entrance lies immediately beside it beneath further machicolations.

The keep has a basement and three main storeys. Two openings lit the basement, which served for storage. The first floor was a common room with two small windows set at the ends of alcoves. The upper floor contained the MacNeil chief’s apartment and had three windows. The upper levels may have formed separate lodgings and included latrines. A stair about one metre wide is housed within the wall thickness, while modern access to the upper floors is also provided by a wooden stair from the courtyard.

Tanist House

Tanist House, or Heir’s House, occupies the western corner of the enclosure. A tanist was a designated heir or successor in certain Gaelic systems of leadership, so the name associates this building with the chief’s heir. The house was rebuilt in 1956 and 1957.

Great Hall and Marion of the Head’s Addition

The Great Hall forms the northwestern wing and was rebuilt in 1958 and 1959. Its first floor was arranged as living accommodation. The Great Hall and Marion of the Head’s Addition retain two storeys, fireplaces, square windows, and individual doors opening onto the courtyard. Their ground floors were divided into several apartments. The hall’s extension also blocked the former postern and later carried an additional storey.

Gockman’s House

Gockman’s House stands beside the gate and probably dates from the seventeenth century. It served as a guard’s residence and was also used, among other purposes, as a forge, according to archaeological evidence.

The chapel

The chapel occupies the northeastern wing and is identified as the oldest stone building in the enclosure, although its original function and date remain uncertain. It contains the tomb of the MacNeil chiefs. A separate mortuary chapel was installed beside the watchtower during the restoration of the 1950s.

Water supply and archaeological evidence

Two former artesian wells lie in the courtyard. An artesian well draws groundwater under pressure from a confined underground aquifer. One well stands in front of the kitchens, while the other is located at the angle between Tanist House and Marion of the Head’s Addition. Their freshwater supply served daily needs and could sustain a siege when the surrounding seawater was undrinkable.

Excavation found substantial building rubble directly beneath the eastern courtyard surface, including stones bearing mortar. The material probably came from an earlier building that had been demolished or collapsed and was reused to level the courtyard before the kitchen was constructed. A stone drain ran beneath the Great Hall, while a paved surface, deposits containing animal bone, shell, and pottery, and floor surfaces from demolished buildings were also uncovered.

Further deposits occurred in the courtyard, the keep foundations, and the prison. They contained construction debris, bones, shells, and large quantities of broken pottery ranging from prehistoric times through the medieval period to the recent past. A wooden floor made from driftwood was found in the keep foundations. Outside the walls, south of the keep, the late-sixteenth-century ruins of the galley crew’s dwelling survive beside a stone wall enclosing a roughly circular area, a small breakwater protecting the galley’s anchorage, and a small jetty. The circular enclosure may have been a tidal fish trap or a small harbour for the galley.