Place · Ireland

The history of Templerobin

A monastery turned fortress turned prison
Last reviewed 16 October 2026 · A four-minute read · 600–1985

Templerobin takes in Spike Island in Cork Harbour, a 103-acre point of ground once held to be the site of Saint Mochuda's 7th-century monastery, later fortified, held by Norman lords and Irish gentry, used as a convict depot and prison, and reopened as a heritage site in 2004.

The short answer

Haulbowline Road sits on Spike Island in Cork Harbour, where a monastery tradition credits Saint Mochuda with a 7th-century foundation, later replaced by Fort Westmoreland, a star-shaped fortress begun in 1790. The island then served as a convict depot from 1847 to 1883 and an IRA and later Irish prison, closing in 2004 before reopening as a heritage site.

Spike Island
Spike Island — 2011 · Stackc · CC BY-SA 4.0
7th century to 12th century

A monastery grew into a center of learning

Spike Island is an island in Cork Harbour, now run as a heritage tourist attraction with tours through its old fort and prison blocks. Long before any fort stood here, the island held a monastery. Records credit its founding to Saint Mochuda in the 7th century, though the attribution is disputed. One account, the Life of St Mochuda, ties him instead to a place called Rahen, not Spike. Whatever its founder, the monastery grew into a real center of learning. Marina Smyth argues the island may have been home to the "Irish Augustine," a monk whose manuscripts were made in the style of the Book of Kells. The Annals record an abbot here too: Sealbhac, who died in 821. A 1178 grant to an abbey in Dublin names a church on the island, Saint Rusien, pointing again to a Celtic monastic settlement. Ruins of that church were still being reported here as late as 1774.

1182 to 1650s

Norman and Irish families held the island in turn

Ownership of the island passed through Norman and Irish hands for centuries. Raymond Mangunel was granted the island in 1182. In 1490, Thomas Pyke handed his holdings here to Maurice Ronan of Kinsale. The Roche and Galwey families held it until the Irish rebellion of 1641 cost them the land for good. By the 1650s, Spike Island had taken on a darker role. Oliver Cromwell's forces used it to hold Irish prisoners of war before shipping them off to the colonies of the Caribbean and the Americas, the start of a long history of the island as a place of confinement rather than worship.

1779 to 1806

A star-shaped fort replaced a temporary earthwork battery

Britain built its first fort on Spike Island in 1779, a temporary earthwork armed with eighteen cannon, raised to guard the harbor during the American War of Independence. It came down again in 1783 to save on rent. A bigger plan followed. In 1790, work began on a permanent star-shaped fort, named Fort Westmoreland. The foundation stone for the main structure was laid in June 1804. By 1806, the first regular garrison moved in. The walls, bastions, and barracks were largely finished by 1820, though money for the project ran dry before every detail was done.

1847 to 1883

A convict depot held over two thousand prisoners

In 1847, Spike Island became a convict depot meant to be temporary, but it lasted 36 years. Crowded into barracks built for far fewer, over two thousand prisoners were held here at once. Convicts quarried stone and built the docks at nearby Haulbowline, working off their sentences under harsh conditions. More than 250 of them are buried in a mass grave on the island's western side, many dead from the Great Famine years. John Mitchel, a leading Irish nationalist convicted of treason felony, was held here in 1848 before being shipped on to penal exile. Transportation to the colonies was abolished in 1853, but Spike Island kept its prisoners long after. The depot finally closed in 1883, and the island returned to purely military use.

1916 to 1921

IRA internees escaped the fort during the war

During the First World War, the crew of the German ship Aud was briefly held on the island after their failed gun-running mission ahead of the 1916 Easter Rising. The fort's role as a prison returned in force during the Irish War of Independence. From 1921, the British held up to 1,200 men here, IRA members and suspects alike. Conditions were tense. Internee riots that September ended with men marched into the dry moat as punishment. Escapes punctuated the year. On 29 April, three prisoners slipped away and were picked up offshore by motor launch. In November, seven more got out in a single night, among them Dick Barrett and Moss Twomey, both to become senior IRA figures.

1938 to 2004

Ireland raised its flag over a renamed fort

Spike Island stayed under British control even after Irish independence, one of three Treaty Ports kept by the UK under the 1921 treaty. That ended on 11 July 1938, when British troops handed the fort to the new Irish state. Éamon de Valera watched the Irish tricolor raised over the walls. The fort was renamed Fort Mitchel, after John Mitchel, the nationalist who had once been its prisoner. The island kept its military role for decades, later serving as a prison and young offenders institution. In 1985, inmates rioted; a government committee afterward found that officers and civilians on the island had become virtual prisoners of the men they guarded. The prison finally closed in 2004.

2010 to now

A former prison became Europe's top attraction

Cork County Council took over the island in 2010 to turn it into a heritage site. The transformation worked. By 2019, more than 81,000 people visited in a single year, and in 2017 Spike Island was named Europe's top tourist attraction at the World Travel Awards. Visitors now walk the same fort walls, barracks, and dry moat that once held convicts, prisoners of war, and IRA men. Haulbowline Island, across the water, has Famine dead interred there in the 1840s. In 1603, Cork's own city leaders were accused of plotting to tear down its new fortifications, a charge that saw the city's Recorder, William Meade, tried for treason.

Spike Island is open to visitors today, who can walk its star-shaped fort and former prison blocks by guided tour.

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Where this is

51.836°N 8.289°W TILE ≈ 1.2 × 0.6 KM
Place
Spike Island
Town
Templerobin
Country
Ireland
Tile
≈1.2 × 0.6 km (geohash6)
Last reviewed
16 October 2026

The layers, in order

Sourced records, high and medium confidence. Era background is marked as such.
Medieval
7th century – 821 AD
Tradition holds that Saint Mochuda founded a monastery on Spike Island in the 7th century, and an abbot named Sealbhac died here in 821 AD, recorded in the Irish annals.
1178–1490
After Norman lords surrendered the land in 1178, the island passed through a chain of owners named in the records — Raymond Mangunel in 1182, the Pyke family in the 1400s, and Maurice Ronan of Kinsale by 1490.
Early modern
1602–1603
A kilometer across the water, Haulbowline Island was fortified in 1602 under Lord Mountjoy during the Nine Years' War, and Cork's own Recorder, William Meade, was charged with treason the following year for allegedly plotting to demolish it.
Wikipedia, Haulbowline · record, high
1650s
During Oliver Cromwell's campaigns in the 1650s, Spike Island held Irish prisoners of war awaiting transportation to the American and Caribbean colonies.
RTE Radio 1 · record, medium
1779–1802
A temporary artillery battery built in 1779 during the American War of Independence was demolished by 1783, and construction of the permanent Fort Westmorland began here in 1790 under Charles Vallancey's design.
Modern
The island's rock is Old Red Sandstone, laid down as river and floodplain deposits some 360 to 380 million years ago, the same stone quarried by prisoners to build the fort's walls.
Era background — not a record of this tile · Macrostrat
6 June 1804
General Sir Eyre Coote laid the foundation stone of a major new fortress here on 6 June 1804, after engineers warned the island was Cork Harbour's true point of defense.
1840s
A burial ground on Haulbowline Island, a kilometer across the water, holds the dead of famine-era pauper processing and detention operations from the 1840s, later covered over as the island changed use.
Travelpoi · record, medium
1847–1883
From 1847 Spike Island became a convict depot during the Great Famine years, crowding more than 2,000 prisoners into barracks meant for far fewer, while they quarried stone and built the harbor's docks.
Openwaterpedia · record, high
1848
The Young Irelander John Mitchel was held prisoner here in 1848 after being convicted of sedition and treason felony; the fort was later renamed Fort Mitchel in his honor.
An Phoblacht · record, high
1921
The British converted the fort into a military prison in 1921 holding up to 1,200 IRA prisoners and internees, around 900 of them held only on suspicion.
Irish Examiner · record, high
10–11 November 1921
On the night of 10–11 November 1921, seven internees — including Dick Barrett, Tom Crofts and Moss Twomey — escaped from the prison here.
Irish Examiner · record, high
1921
Padraig de Faoite, a captain in the East Clare Brigade held here in 1921, was shot by a sentry while trying to retrieve a ball during a hurling game.
11 July 1938
On 11 July 1938 Spike Island was handed over to the Irish state under the Anglo-Irish Agreement, ending over 150 years as a British fort, with Éamon de Valera watching the tricolour raised.
1 September 1985
On 1 September 1985, young offenders held on the island rioted and set fire to a cell block, and a Dáil committee later reported that staff and civilians were virtual prisoners of the inmates.
Wikishire · record, medium

Questions about this place

Answered in one sentence, then in full above
What was here before the fort on Spike Island?
A monastery stood on Spike Island before any fort, traditionally founded by Saint Mochuda in the 7th century, with an abbot named Sealbhac recorded as dying there in 821.
What happened at Spike Island during the Irish War of Independence?
The British held up to 1,200 IRA members and suspects at Spike Island from 1921, and that November seven internees, including Dick Barrett and Moss Twomey, escaped in a single night.
Why was Spike Island called the Alcatraz of Ireland?
From 1847 Spike Island operated as a convict depot for 36 years, crowding more than 2,000 prisoners into barracks built for far fewer while they quarried stone and built the docks at Haulbowline.
Who was John Mitchel and why is the fort named after him?
John Mitchel was a Young Irelander convicted of treason felony and held prisoner on Spike Island in 1848; the fort was later renamed Fort Mitchel in his honour.
When did Ireland take control of Spike Island?
British troops handed Spike Island to the Irish state on 11 July 1938, with Éamon de Valera watching the Irish tricolour raised over the fort walls.
Is Spike Island open to visitors today?
Yes, Cork County Council took over the island in 2010 to develop it as a heritage site, and by 2019 it drew more than 81,000 visitors in a single year, having been named Europe's top tourist attraction in 2017.

Where this came from

1
Spike Island Cork official site / Annals — A monastery here, founded by Saint Mochuda
2
Wikipedia, Spike Island, County Cork — Norman lords and Irish gentry held the island in turn
3
RTE Radio 1 — Cromwell's prisoners held here before transportation
4
Openwaterpedia — A convict depot for 36 years, the 'Alcatraz of Ireland'
5
An Phoblacht — John Mitchel imprisoned for sedition, 1848
6
Irish Examiner — 1,200 IRA men held in the War of Independence
7
Irish Examiner — Seven internees escape in the dark, November 1921
8
Rebel Cork's Fighting Story blog — A prisoner shot retrieving a hurling ball
9
Spike Island Cork official site — The British flag comes down, 1938
10
Wikishire — Inmates riot and set fire to a cell block, 1985
11
Wikipedia, Haulbowline — Haulbowline fortified against the Nine Years' War, 1602
12
Travelpoi — Famine dead buried and hidden on Haulbowline

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