Fort Denison, part of the
Sydney Harbour National Park
The Sydney Harbour National Park is an List of national parks of Australia, Australian national park comprising parts of Port Jackson, Sydney and its foreshores and various islands. The national park lies in New South Wales and was created progr ...
, is a
protected national park
A national park is a nature park designated for conservation (ethic), conservation purposes because of unparalleled national natural, historic, or cultural significance. It is an area of natural, semi-natural, or developed land that is protecte ...
that is a
heritage-listed
This list is of heritage registers, inventories of cultural properties, natural and human-made, tangible and intangible, movable and immovable, that are deemed to be of sufficient heritage value to be separately identified and recorded. In ma ...
former
penal
Penal is a town in south Trinidad, Trinidad and Tobago. It lies south of San Fernando, Princes Town, and Debe, and north of Moruga, Morne Diablo and Siparia. Penal is noted as a heartland of Hindu and Indo-Trinidadian culture.
History
Up ...
site and
defensive facility occupying a small island located north-east of the
Royal Botanic Garden and approximately east of the
Opera House
An opera house is a theater building used for performances of opera. Like many theaters, it usually includes a stage, an orchestra pit, audience seating, backstage facilities for costumes and building sets, as well as offices for the institut ...
in
Sydney Harbour
Port Jackson, commonly known as Sydney Harbour, is a ria, natural harbour on the east coast of Australia, around which Sydney was built. It consists of the waters of Sydney Harbour, Middle Harbour, North Harbour and the Lane Cove River, Lane ...
,
New South Wales
New South Wales (commonly abbreviated as NSW) is a States and territories of Australia, state on the Eastern states of Australia, east coast of :Australia. It borders Queensland to the north, Victoria (state), Victoria to the south, and South ...
,
Australia
Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
. The island is also known as Mattewanye or Muddawahnyuh in the
Eora language, and as Pinchgut Island.
The site contains
time gun,
navigational aid
A navigational aid (NAVAID), also known as aid to navigation (ATON), is any sort of signal, markers or guidance equipment which aids the traveler in navigation, usually nautical or aviation travel. Common types of such aids include lighthouses, ...
s and
tide gauge
A tide gauge is a device for measuring the change in sea level relative to a vertical datum. It is also known as a mareograph, marigraph, and sea-level recorder.
When applied to freshwater continental water body, water bodies, the instrument may ...
facilities. Correctional and military facilities were designed by George Barney and built from 1840 to 1862 by William Randle. The property is owned by the
Office of Environment & Heritage, an
agency of the
Government of New South Wales
The Government of New South Wales, also known as the NSW Government, is the executive state government of New South Wales, Australia. The government comprises 11 portfolios, led by a ministerial department and supported by several agencies. Th ...
. It was added to the
New South Wales State Heritage Register
The New South Wales State Heritage Register, also known as NSW State Heritage Register, is a heritage list of places in the state of New South Wales, Australia, that are protected by New South Wales legislation, generally covered by the Heritag ...
on 2 April 1999.
In 1978 the former fortress was listed on the (now defunct)
Register of the National Estate
The Register of the National Estate was a heritage register that listed natural and cultural heritage places in Australia that was closed in 2007. Phasing out began in 2003, when the Australian National Heritage List and the Commonwealth Heri ...
,
and is currently used as a national park, nature reserve, tourist facility, and as a function space.
History
Prior to European settlement, the island had the
Eora
The Eora (; also ''Yura'') are an Aboriginal Australian people of New South Wales. Eora is the name given by the earliest European settlers to a group of Aboriginal people belonging to the clans along the coastal area of what is now known as ...
name Mattewanye (sometimes Mallee’wonya).
Prison
After the
First Fleet
The First Fleet were eleven British ships which transported a group of settlers to mainland Australia, marking the beginning of the History of Australia (1788–1850), European colonisation of Australia. It consisted of two Royal Navy vessel ...
arrived in 1788,
Governor Phillip and his advocate-general used the name "Rock Island". In 1788, a convict named Thomas Hill was sentenced to a week on bread and water in irons there. The island came to be known as "Pinchgut". Once a high or higher sandstone islet, the rock was levelled by convicts under the command of
Captain George Barney, the civil engineer for the colony, who quarried it for
sandstone
Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sand ...
to construct nearby
Circular Quay
Circular Quay is a harbour, former working port and now international passenger shipping terminal, public piazza and tourism precinct, heritage area, and transport node located in Sydney, New South Wales, Australia, on the northern edge of the ...
.
In late 1796 the Governor had installed a
gibbet
Gibbeting is the use of a gallows-type structure from which the dead or dying bodies of criminals were hanged on public display to deter other existing or potential criminals. Occasionally, the gibbet () was also used as a method of public ex ...
on Pinchgut. A convict to be hanged and then gibbeted there was Francis Morgan. In 1793, the British transported him to New South Wales for life as punishment for a murder. The authorities in NSW executed Morgan for bashing Simon Raven to death in Sydney on 18 October 1796. On 30 November 1796, Morgan was hanged; following his execution, his body was hung in chains (gibbeting) on Pinchgut. His skeleton was still hanging there four years after his execution. He said to the hangman that the only thing worth mentioning was the superb view of the harbour from his high elevation, and that he was sure there were no waters the world over to compare with it for beauty.
Military fortress
In 1839, two American warships entered the harbour at night and circled Pinchgut Island. Concern with the threat of foreign attack caused the government to review the harbour's inner defences.
Barney, who had earlier reported that Sydney's defences were inadequate, recommended that the government establish a fort on Pinchgut Island to help protect Sydney Harbour from attack by foreign vessels. Fortification of the island began in 1841 but was not completed. Construction resumed in 1855 because of fear of a
Russia
Russia, or the Russian Federation, is a country spanning Eastern Europe and North Asia. It is the list of countries and dependencies by area, largest country in the world, and extends across Time in Russia, eleven time zones, sharing Borders ...
n naval attack during the
Crimean War
The Crimean War was fought between the Russian Empire and an alliance of the Ottoman Empire, the Second French Empire, the United Kingdom of Great Britain and Ireland, and the Kingdom of Sardinia (1720–1861), Kingdom of Sardinia-Piedmont fro ...
, and was completed on 14 November 1857. The newly built fort then took its current name from
Sir William Thomas Denison, the Governor of New South Wales from 1855 to 1861.
The fortress features a distinctive
Martello tower
Martello towers are small defensive forts that were built across the British Empire during the 19th century, from the time of the French Revolutionary Wars onwards. Most were coastal forts.
They stand up to high (with two floors) and typica ...
, the only one ever built in Australia and the last one ever constructed in the
British Empire
The British Empire comprised the dominions, Crown colony, colonies, protectorates, League of Nations mandate, mandates, and other Dependent territory, territories ruled or administered by the United Kingdom and its predecessor states. It bega ...
. It was constructed using of sandstone from nearby Kurraba Point,
Neutral Bay
Neutral Bay is a suburb on the Lower North Shore of Sydney, New South Wales, Australia. Neutral Bay is around 1.5 kilometres north of the Sydney central business district, in the local government area of North Sydney Council.
Neutral Bay takes ...
. The tower's walls are between thick at the base and thick at the top. However, developments in artillery rendered the fort largely obsolete by the time it was completed. The tower itself had quarters for a garrison of 24 soldiers and one officer. Fort Denison's armament included three muzzle loaders in the tower, two guns, one on a 360-degree traverse on the top of the tower and one in a bastion at the other end of the island, and twelve cannons in a battery between the base of the tower and the flanking bastion.
Eventually all the guns were removed, except for the three muzzle-loading cannons in the gun room in the tower, which were installed before construction was complete. The passages within the tower are too narrow to permit these to be removed. However, from the beginning the three cannons were of limited utility. The
embrasure
An embrasure (or crenel or crenelle; sometimes called gunhole in the domain of Age of Gunpowder, gunpowder-era architecture) is the opening in a battlement between two raised solid portions (merlons). Alternatively, an embrasure can be a sp ...
s for the cannons were too small to use the guns effectively and by the time a cannon was loaded the ship it was to fire on would have sailed past. Lastly, the guns'
recoil
Recoil (often called knockback, kickback or simply kick) is the rearward thrust generated when a gun is being discharged. In technical terms, the recoil is a result of conservation of momentum, for according to Newton's third law the force requ ...
was too powerful for the small room.
In 1906, a saluting gun (pictured below) was transferred from Dawes Point to Fort Denison.
In 1913 a
lighthouse
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lens (optics), lenses and to serve as a beacon for navigational aid for maritime pilots at sea or on inland waterways.
Ligh ...
beacon built in Birmingham, England, and shipped to Sydney, replaced the gun on the roof of the tower. The light is called
Fort Denison Light, which is still in use.

In May 1942, three Japanese
two-man midget-submarines attacked Sydney Harbour. When the US Navy cruiser fired on the Japanese, some of its shells hit Fort Denison, causing the tower minor damage which remains visible.
Explosive prank
In October 1900, as the
Boer war
The Second Boer War (, , 11 October 189931 May 1902), also known as the Boer War, Transvaal War, Anglo–Boer War, or South African War, was a conflict fought between the British Empire and the two Boer republics (the South African Republic an ...
raged in Africa, the
White Star Line
The White Star Line was a British shipping line. Founded out of the remains of a defunct Packet trade, packet company, it gradually grew to become one of the most prominent shipping companies in the world, providing passenger and cargo service ...
ship sailed into Sydney Harbour and dropped anchor in
Neutral Bay
Neutral Bay is a suburb on the Lower North Shore of Sydney, New South Wales, Australia. Neutral Bay is around 1.5 kilometres north of the Sydney central business district, in the local government area of North Sydney Council.
Neutral Bay takes ...
. One night, the fourth officer,
Charles Lightoller
Commander Charles Herbert Lightoller, (30 March 1874 – 8 December 1952) was a British mariner and naval officer who was the second officer on board the . During the ship's sinking, and as the officer in charge of loading passengers into li ...
and two shipmates rowed to Fort Denison and climbed the tower with a plan to fool locals into believing a
Boer
Boers ( ; ; ) are the descendants of the proto Afrikaans-speaking Free Burghers of the eastern Cape frontier in Southern Africa during the 17th, 18th, and 19th centuries. From 1652 to 1795, the Dutch East India Company controlled the Dutch ...
raiding party was attacking Sydney. They hoisted a makeshift Boer flag on the lightning conductor and fired a harmless wad of cotton waste from one of the 8-inch cannons.
The blast shattered a few of the fort's windows but caused no other damage. Lightoller was never apprehended but confessed to his company's superiors and related the whole story in an autobiography.
He was transferred to the Atlantic route and went on to be the second officer of the and the most senior officer to survive the
1912 sinking of the ship. He was a key witness at both the British and American inquiries into the disaster.
Current use
Recent restorative works
Since 1992, the
NSW National Parks & Wildlife Service
The National Parks and Wildlife Service (NPWS) is a directorate of the New South Wales Department of Planning and Environment and responsible for managing more than 890 national parks and reserves, covering over 7.5 million hectares of land ac ...
, which manages the site, has spent around A$2m conserving and upgrading the facilities.
EnergyAustralia
EnergyAustralia (formerly TRUenergy) is an electricity generation, electricity and gas retailing private company in Australia. It is one of the "big three" retailers in the National Electricity Market. It generates electricity primarily using ...
also made a significant contribution for the work via the Foundation for National Parks and Wildlife.
Following publication of a conservation plan, further renovation commenced in 1999 and was completed in 2001. The conservation and adaptive re-use of the island was awarded the
NSW Royal Australian Institute of Architects (RAIA) Conservation Award; a Commendation in the National RAIA Awards; and a
National Trust
The National Trust () is a heritage and nature conservation charity and membership organisation in England, Wales and Northern Ireland.
The Trust was founded in 1895 by Octavia Hill, Sir Robert Hunter and Hardwicke Rawnsley to "promote the ...
Heritage Award in 2001.
Increased harbour traffic has already destroyed the slipway. Furthermore, the porous sandstone drinks in the salt right down to the fort's foundations. In 2007 the government announced a $1.5 million rescue package. Fort Denison is now home to more than 100 birds.

Fort Denison – Muddawahnyuh remains closed to visitors for service upgrades and conservation works until mid-2025. Fort Denison is a museum, tourist attraction, restaurant, and popular location for wedding receptions and corporate events. The tourist facility contains an exhibition of the island's history from Aboriginal times. Access to Fort Denison is via a
ferry that departs Wharf 6 at Circular Quay every 45 minutes, 7 days a week. The price of the ferry ticket includes the landing fee. Guided tours of the island, including the Martello tower are at an additional cost. NSW National Parks & Wildlife Services conducts the tours.
In 2004 the NSW National Parks & Wildlife Service restored the lighthouse beacon, which is still in use and supports operation of a Harbour Navigational Facility, with
tide gauge
A tide gauge is a device for measuring the change in sea level relative to a vertical datum. It is also known as a mareograph, marigraph, and sea-level recorder.
When applied to freshwater continental water body, water bodies, the instrument may ...
, navigation channel markers,
foghorn
A foghorn or fog signal is a device that uses sound to warn vehicles of navigational hazards such as rocky coastlines, or boats of the presence of other vessels, in foggy conditions. The term is most often used in relation to marine transport. ...
and beacon, established in the mid-19th century. The
Bureau of Meteorology
The Bureau of Meteorology (BOM or BoM) is an executive agency of the Government of Australia, Australian Government that is responsible for providing Weather forecasting, weather forecasts and Meteorology, meteorological services to Australia a ...
operates a weather facility from the island and publishes observations at half-hourly intervals on its website.
The custom of firing a gun daily at 1pm began in 1906 to enable sailors to set their
ship's chronometers correctly. The daily gun continued until
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
when the authorities stopped it for fear of alarming residents. The practice recommenced in 1986.
Restaurant on the Island
The Fort Denison Restaurant was opened on the island in 2006, although the restaurant lease expired in June 2017 and is yet to be renewed. Throughout the years since it has been voted in the top five waterfront restaurants worldwide by ''The Sydney Morning Herald'', and was open for lunch seven days a week year round, dinners on a Sunday, and for special events and occasions which can be found on their website. Bookings for major occasions, such as New Year's Eve, were coveted.
Popular culture
Fort Denison was the location of the 1959 film ''
The Siege of Pinchgut'', released in the United States as ''Four Desperate Men''. Directed by
Harry Watt, written by
Jon Cleary
Jon Stephen Cleary (22 November 191719 July 2010) was an Australian writer and novelist. He wrote numerous books, including '' The Sundowners'' (1951), a portrait of a rural family in the 1920s as they move from one job to the next, and '' The ...
and starring
Aldo Ray
Aldo Ray (born Aldo Da Re; September 25, 1926 – March 27, 1991) was an American actor of film and television. He began his career as a contract player for Columbia Pictures before achieving stardom through his roles in '' The Marrying Kind, P ...
, the production was the final Australian film of the British-based
Ealing Studios
Ealing Studios is a television and film production company and facilities provider at Ealing Green in west London, England. Will Barker bought the White Lodge on Ealing Green in 1902 as a base for film making, and films have been made on th ...
. The island also featured as the base of operations for Neville Savage in the sixth episode of the Australian children's television show ''
Mission Top Secret''. Fort Denison was often seen in the television series ''
Water Rats''. One episode in season two of the show, ''End of the Line'', featured a party on the island.
Description
Fort Denison on Sydney Harbour is within the visual catchment of the
Sydney Opera House
The Sydney Opera House is a multi-venue Performing arts center, performing arts centre in Sydney, New South Wales, Australia. Located on the foreshore of Sydney Harbour, it is widely regarded as one of the world's most famous and distinctive b ...
, the
Sydney Harbour Bridge
The Sydney Harbour Bridge is a steel through arch bridge in Sydney, New South Wales, Australia, spanning Port Jackson, Sydney Harbour from the Sydney central business district, central business district (CBD) to the North Shore (Sydney), North ...
, the Royal Botanic Garden and the Sydney Harbour Naval Precinct.
[NPWS, 2016][ Fort Denison is the only Sydney Harbour island which is no longer described as an island. Even Garden Island, now visually part of the mainland (and anything but a garden) is still known as an island. The island known as Mattewanye (small rocky island) to Aborigines and Rock Island to the first settlers, is now popularly known as Fort Denison and viewed as a built artefact rather than an island.][
From a distance no evidence of its original island character is apparent, except perhaps scattered rocks at low tide. However, on close inspection the ]sandstone
Sandstone is a Clastic rock#Sedimentary clastic rocks, clastic sedimentary rock composed mainly of grain size, sand-sized (0.0625 to 2 mm) silicate mineral, silicate grains, Cementation (geology), cemented together by another mineral. Sand ...
bedrock visible below the south west battery reveals part of the rock of the island, particularly when combined with the pictorial evidence provided by drawings such as that by Barrington in 1802.[
;The Fort : The visual impact of the fort is a combination of the strong vertical mass of the Martello tower and the equally strong horizontal lines of the low barrack and battery buildings. The two distinct building forms reflects the history of the staged Fort construction; which progressed from the original horizontal form of the battery, and later construction of the barracks and Martello tower. The tower, which only lost its dominant role in marking the water entrance to the city with the construction of the Sydney Opera House, was built with an open gun platform (terreplein) which surmounted two internal levels. A section through the tower, shows the navigational light which replaced the upper cannon in 1913. The lower internal level contained rooms for the storage of gunpowder and provisions and the middle level still houses the three original cannons. Internal tower circulation is via a spiralling staircase that connects the three tower levels. External access to the tower is through a single external door from the upper terrace level battery and bastion.]
Three major elements comprise the strong horizontal section of the fort; the battery and bastion, the barracks and terrace.[
;Gun Battery and Bastion : The outward facing defensive side of the fort known as the gun battery and bastion confronted incoming ships. It is constructed out of the island's sandstone bedrock. The battery consists of an open working area which services a series of nine gun placements and corresponding slanted firing openings which are equally positioned along the raised ]parapet
A parapet is a barrier that is an upward extension of a wall at the edge of a roof, terrace, balcony, walkway or other structure. The word comes ultimately from the Italian ''parapetto'' (''parare'' 'to cover/defend' and ''petto'' 'chest/brea ...
wall of the battery. An underground water tank has been cut into the bedrock of the battery. The bastion located at the southern end of the battery was constructed to house a single cannon set behind a raised stone parapet. The cannon was located on a raised circular revolving mount to maximise the cannon's aim of fire.[
;Wet Ditch and Breakwater : A wet ditch and breakwater formed by sandstone blocks separates the fort from the open harbour channel. Beyond this is a breakwater which surrounds the whole island which moderates the wave action against the stone fabric of the fort.][
;Barrack : The main single storey building is the barrack, its eight ]chimney
A chimney is an architectural ventilation structure made of masonry, clay or metal that isolates hot toxic exhaust gases or smoke produced by a boiler, stove, furnace, incinerator, or fireplace from human living areas. Chimneys are typical ...
s indicate its original accommodation purpose. The barracks are built into cut back bedrock and contain a row of single rooms used for military bunk-style accommodation for the lower ranks as well as accommodation for two separate officers' quarters. A central breezeway and vault covered staircase allows access from the barracks and lower terraces to the upper terrace battery, bastion and Martello tower. The two end rooms adjoining the barracks, known as the Tide Gauge Room to the north and the West Room to the south, were constructed soon after the completion of the barracks. The loopholes, or angled openings, were designed to enable the defensive fire whilst defending against enemy attack.[
;Terrace : The lower north west facing terrace is constructed on the same level as the barracks. It was probably built on rubble fill which is contained by a low stone wall.]
The terrace is open and not defensive in nature, as it faces away from the open sea and potential attack. It currently has a bitumen surface and several small planted garden beds. Garden beds were constructed on this terrace during the 20th century as part of the domestication of the fort by the Sydney Harbour Trust and later Maritime Services Board caretakers. Two sewerage treatment units which service the toilets are concealed in the garden beds at either end of the barracks.[
;Plantings : A Canary Island date palm ('']Phoenix canariensis
''Phoenix canariensis'', the Canary Island date palm, is a species of flowering plant in the palm family Arecaceae, native to the Canary Islands off the coast of Northwestern Africa. It is a relative of ''Phoenix dactylifera'', the true date pal ...
'') planted in one raised garden bed on the terrace's western side and a fruiting fig tree (''Ficus carica
The fig is the edible fruit of ''Ficus carica'', a species of tree or shrub in the flowering plant family Moraceae, native to the Mediterranean region, together with western and southern Asia. It has been cultivated since ancient times and is ...
'' cv.) at the south-west base of the Martello Tower are the only trees on Fort Denison.
An external cannon is on the Eastern Terrace. A tall flag pole with side spars runs three permanently flown flags on this terrace.[
]
Condition
As at 26 May 2014, the physical condition is excellent. Archaeological potential is high.[ Published material on such towers in the English speaking world suggests that this may well be the most intact tower.]
Modifications and dates
The following modifications have been made to Fort Denison:[
*1840–1842 – construction of battery
*1856–1858 – construction of battery, barrack and tower and bastion
*1858–1862 – construction of terrace, west room and tide gauge room
*1917 – construction of slipway
]
Heritage listing
Fort Denison was listed on the New South Wales State Heritage Register
The New South Wales State Heritage Register, also known as NSW State Heritage Register, is a heritage list of places in the state of New South Wales, Australia, that are protected by New South Wales legislation, generally covered by the Heritag ...
on 2 April 1999 .[
]
Tide gauge
Tides have been measured at Fort Denison since 1857 on completion of the fort, initially using a bench mark cut into the stonework of the Martello Tower. From 1867 successive instruments were used as tide measuring technology developed.[Refer the interpretive panel installed in the tide room at Fort Denison.] (The measurements since 1914 are graphed by Bureau of Meteorology
The Bureau of Meteorology (BOM or BoM) is an executive agency of the Government of Australia, Australian Government that is responsible for providing Weather forecasting, weather forecasts and Meteorology, meteorological services to Australia a ...
).
The Fort Denison photographs below show float activated tide gauge instruments in a cabinet and the system's stilling well. A wire connected to the upper drum mechanism passes out through the bottom right of the cabinet and runs over a pulley to drop down to the float system in the large pipe in the well. This system is now obsolete at Fort Denison but maintained as a museum exhibit. To the right of the large pipe in the well is an enclosed pipe which rises to the active modern system.
Tide heights and times at Fort Denison are the primary base referent for published tide information for other places in the state of New South Wales.
Gallery of guns
See also
* Punishment in Australia
References
Sources
*
Attribution
Further reading
*
*
*
*
*
*
External links
* , NSW National Parks & Wildlife Service
The National Parks and Wildlife Service (NPWS) is a directorate of the New South Wales Department of Planning and Environment and responsible for managing more than 890 national parks and reserves, covering over 7.5 million hectares of land ac ...
*
* Creative Commons license">CC-By-SA">Creative_Commons_license.html" ;"title="/nowiki>Creative Commons license">CC-By-SA/nowiki>
NSW Government: "Our Built Heritage Case Study: Fort Denison"
*
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