The fortifications of Portsmouth are extensive due to its strategic position on the English Channel and role as home to the Royal Navy. For this reason, Portsmouth was, by the 19th century, one of the most fortified cities in the world. [1] The fortifications have evolved over the centuries in response to changes in tactics and technology and the area defended has increased. While the first defences focused on Portsmouth harbour, in step with the fortifications of Gosport, later defensive structures protected the whole of Portsea Island and an increasing distance inland. At the same time, the fortifications of Portsmouth and Gosport became part of the wider fortifications of the Solent. Old Portsmouth, on the southwest corner of Portsea Island, has been walled for much of its history.
The first fortification in the area was Portchester Castle, which, ultimately, dates back to the Roman Portus Adurni. Its position allowed it to provide a degree of defence for the upper reaches of Portsmouth Harbour. The first recorded fortifications on Portsea Island appear to have been a wall constructed in 1212 around a primitive shipyard sited just to the north of what later became Camber Dock. [2] The wall lasted less than twelve years. [2]
During the 14th century, Portsmouth was subject to attacks in 1338, 1369, 1377 and 1380. [3] Evidence suggests that simple earthworks were constructed and reconstructed around the settlement in response. [4] The first structure built to defend Portsmouth proper was a wooden version of the Round Tower constructed between 1418 and 1426. [5] Four years later, a second wooden tower was added on the opposite side of the harbour. [6]
During Henry VII's rule, the Round Tower was rebuilt in stone and the Square Tower added. [6] There is, however, some question as regards the extent to which it was meant to be a defensive structure. [7] It appears likely that what is now known as the "saluting platform" was also built during Henry VII's reign. [5] Southsea Castle at the southern tip of Portsea Island was built by his son and successor Henry VIII. [8]
To the north of the city, it is believed that a small fortification was constructed to defend the bridge across Portsbridge Creek. [9] In 1522, the first of several defensive chains that could be raised in an attempt to block the harbour entrance was ordered. [10]
By 1542, Portsmouth was surrounded by defensive ramparts and towers built from earth and wood. One tower was positioned on the corner where the wall extending from the saluting platform met the wall running along the southeast rampart of the town. The southeast rampart was also equipped with what appears to be a firing platform, while another tower was constructed on the corner where the ramparts to the south east and the northeast of the town met. In the centre of the northwest rampart was the town gate defended by a structure known as The Mount which also acted as a bastion. Finally, the wall to the north of the town had a tower at each end one where it joined the northeast wall and one where it met the sea. [5] Gabions were constructed along the edge of the Camber dock area and a palisade made to separate Portsmouth Point from the town. [11] A wooden wall was constructed between the Round Tower and the saluting platform at around the same time. [12]
The next phase of expansion started in the late 1550s and continued through the rest of Elizabeth I's reign. [13] From about 1560, the work was largely under the direction of Richard Popynjay. [12] The ramparts were updated and the gabions along the edge of the Camber and the palisade that cut off Portsmouth point were replaced by stone wall. [13] Other works including improving the various towers with some of them developing into bastions. [12] The Mount defending the town gate was reconstructed, developing into what could be considered a true bastion in the process. [12] The saluting platform also saw some rebuilding work during this period. [12]
Another development during this period is that an increasing number of the names used for the fortifications survived until the present day. The bastion on the corner where the wall extending from the saluting platform met the wall running along the southeast rampart of the town was recorded as Green's Bulwark or Chaterton's Bulwark. Of the two towers on the corners of the north wall of the town the one at the western end was known as the Dock Bulwark while the one at the eastern end is recorded as Guyes Bulwark. The mount is also recorded as being known as the Great Bastion. [12] The gate that controlled access to Portsmouth point was known as the North Gate although by 1571 it (along with other parts of the fortifications) was in a poor state of repair. [14]
The second half of Elizabeth I's reign saw yet more work on the bastions and the first bridge at the Landport gate which was constructed in about 3 years starting 1586. [14] During this time there also appears to have seen a fair amount of repair work. [14] Sometime around 1600 a new gate known as point gate replaced the North Gate in controlling access to Portsmouth point. [15]
At the time of the Civil War, the fortifications mounted around 100 guns and when properly manned were considered by some to be able to withstand a siege of 40,000 men. [16] [17] In one of the first actions of the civil war Parliament managed to capture the city from the royalist forces during the Siege of Portsmouth.
In 1665, Charles II ordered Bernard de Gomme to begin the reconstruction of Portsmouth's fortifications, a process which was to take many years. [18] The year before this a new chain to block the harbour entrance was ordered at a cost of £200. [10] Starting 1678 Fort James was constructed on Burrow Island. [19] Later in the 1680s Southsea castle was rebuilt. [18] In the same decade the Portsbridge fort was also rebuilt. [9]
The city walls were again rebuilt. [20] A second moat was also added with a new defensive line being constructed between the two moats. [20] A ravelin was added at Landport where the London road entered the city. [20]
On the shoreline a new battery was built at the end of Portsmouth point facing Gosport. [21] Another battery, this one with 18 guns, was built that connected to the round tower with a further battery constructed between the square tower and the saluting platform. [21] Beyond this battery, but connected to it by a tunnel, Spur redoubt was constructed. [21]
While the towns defences were being strengthened some thought appears to have been given to their aesthetic appearance. [22] In 1665 Lieutenant-Governor Sir Philip Honeywood ordered that trees be planted on the town walls. [22]
In 1679 Sir Bernard de Gomme built barracks within the town to accommodate two Companies of Foot (120 men) to man the defences. His plan and specification for the building (a double range of ten bays, 153 ft 6 in (46.79 m) long by 36 ft 2 in (11.02 m) deep) represents 'the earliest known detailed drawing of a barracks in England'. [23] The soldiers slept two to a bed, four to a room, with additional rooms being provided for officers at each end of the block, and for sergeants in the middle of the ground floor. By 1684 there were barracks in addition at the Round Tower, and a two-storey block at the Landport Gate.
The first true fortification of the dockyard was constructed between 1665 and 1668 although there had previously been a wall around it. [24] The fortification consisted of an earthen rampart with a single bastion and two demi-bastions. [24]
Later in the 17th century in 1688 the fort protecting the crossing across Portsbridge creek was rebuilt under the direction of the Chief Royal Engineer Sir Martin Beckman. [9]
In the 18th century, Portsea started to grow up around the dockyard and in the 1770s a series of ramparts and moats were constructed to protect this new settlement. [25]
The sheer manpower required by de Gomme's defences meant that after about 1730 the double moat system used around Portsmouth was abandoned with the outer moat being filled in. [26]
At the same time the defences started to focus on protecting the whole of Portsea island. [25] The Portsbridge fort was again rebuilt in 1746. [9] During 1756 and 1757 the first Hilsea lines were constructed in order to protect the north of Portsea island. [27] The first Fort Cumberland was constructed to prevent hostile forces from sailing to Langstone harbour and the first Lumps Fort and Eastney battery were built to protect Eastney beach. [25]
The city and harbour's most recent comprehensive fortifications were built as a result of the 1859 Royal Commission on the Defence of the United Kingdom and consist of the Palmerston Forts in the Solent, the line of Forts situated along the top of Portsdown Hill, forts in Gosport and the Hilsea Lines. [28]
Fort Cumberland and Lumps Fort were significantly rebuilt.
The Portsea fortifications were expanded slightly in the 1840s and 1860s as the dockyard was extended. [29]
The city walls though were for the most part removed in the 1870s and 80s a task accomplished through the use of convict labour. [30] [31]
Improvements in artillery technology had rendered the various landward facing fortifications obsolete over the turn of the century and by the end of the first decade they largely disarmed. [32]
After World War 1 the city council started to buy various defences as they were released by the military. The 1920s and 30s saw the purchase of much of the Hilsea lines and Lumps fort by the city. [33] [34]
During WW2 anti tank defence blocks were constructed on Fraser Beach. [35] Pill boxes were constructed to defend Portsmouth Airport in the form of Pickett-Hamilton Forts. [32] The sea forts were re-equipped with AA guns. [32] A new concrete gun emplacement which contained a single 75mm gun was constructed on the eastern part of the Hilsea lines. [36]
The remaining defences were deactivated when the UK abandoned coastal artillery in 1956. [32]
Of the defences constructed Portsea Island, Southsea Castle, Fort Cumberland, The Round tower, The Square tower, Lumps Fort, Parts of the Hilsea lines, the Spur Redoubt and parts of the walls of old Portsmouth along the seafront all survive. Various fortifications within the naval dockyard also exist.
Beyond Portsea the majority of the Portsdown Forts remain although Fort Wallington has been largely demolished.
Of the four gates in the walls of Old Portsmouth only Landport Gate survives in its original position. [1] King James's gate, Lion Gate and Unicorn Gate have been re-erected slightly further away. [1]
Antitank defence blocks on Fraser Beach are now a grade 2 listed structure. [35] A pair of links from one of the harbour boom chains are on display at Southsea castle. [37] One of the Pickett-Hamilton forts constructed to protect the airport was on display outside the D-Day Story in Southsea. [38] This was removed in 2017 when the museum was refurbished.
Portsmouth is a port city and unitary authority in Hampshire, England. Most of Portsmouth is located on Portsea Island, off the south coast of England in the Solent. This means Portsmouth is the only English city not located primarily on the mainland. Located 74 miles (119 km) south-west of London, 50 miles (80 km) west of Brighton and Hove, and 22 miles (35 km) south-east of Southampton; Portsmouth is part of the South Hampshire conurbation. It is the most densely populated city in the United Kingdom, with a population last recorded at 208,100.
Southsea is a seaside resort and a geographic area of Portsmouth, Portsea Island in the ceremonial county of Hampshire, England. Southsea is located 1.8 miles (2.8 km) to the south of Portsmouth's inner city-centre.
A bastion or bulwark is a structure projecting outward from the curtain wall of a fortification, most commonly angular in shape and positioned at the corners of the fort. The fully developed bastion consists of two faces and two flanks, with fire from the flanks being able to protect the curtain wall and the adjacent bastions. Compared with the medieval fortified towers they replaced, bastion fortifications offered a greater degree of passive resistance and more scope for ranged defence in the age of gunpowder artillery. As military architecture, the bastion is one element in the style of fortification dominant from the mid 16th to mid 19th centuries.
Gosport is a town and non-metropolitan borough, on the south coast of Hampshire, South East England. At the 2021 Census, its population was 81,952. Gosport is situated on a peninsula on the western side of Portsmouth Harbour, opposite the city of Portsmouth, to which it is linked by the Gosport Ferry. Gosport lies south-east of Fareham, to which it is linked by a Bus Rapid Transit route and the A32. Until the last quarter of the 20th century, Gosport was a major naval town associated with the defence and supply infrastructure of His Majesty's Naval Base (HMNB) Portsmouth. As such over the years extensive fortifications were created.
The Hilsea Lines are a line of 18th- and 19th-century fortifications built at Hilsea to protect the northern approach to Portsea Island, an island off the southern coast of England which forms the majority of the city of Portsmouth and its key naval base. They are now used as a greenspace and leisure area, also known locally as Foxes Forest.
Portsea Island is a flat and low-lying natural island 24.5 square kilometres in area, just off the southern coast of Hampshire in England. Portsea Island contains the majority of the city of Portsmouth.
Fort Blockhouse is a former military establishment in Gosport, Hampshire, England, and the final version of a complicated site. At its greatest extent in the 19th century, the structure was part of a set of fortifications which encircled much of Gosport. It is surrounded on three sides by water and provides the best view of the entrance to Portsmouth Harbour. It is unique in that it was built over five centuries from its original construction as a blockhouse in 1431 to the final addition of submarine base structures in the mid-1960s. Coastal fortification was abolished nationally in 1956, and the fort has not been used in a military capacity since 2021.
The Device Forts, also known as Henrician castles and blockhouses, were a series of artillery fortifications built to defend the coast of England and Wales by Henry VIII. Traditionally, the Crown had left coastal defences in the hands of local lords and communities but the threat of French and Spanish invasion led the King to issue an order, called a "device", for a major programme of work between 1539 and 1547. The fortifications ranged from large stone castles positioned to protect the Downs anchorage in Kent, to small blockhouses overlooking the entrance to Milford Haven in Pembrokeshire, and earthwork bulwarks along the Essex coast. Some forts operated independently, others were designed to be mutually reinforcing. The Device programme was hugely expensive, costing a total of £376,000 ; much of this was raised from the proceeds of the Dissolution of the Monasteries a few years before.
Southsea Castle, historically also known as Chaderton Castle, South Castle and Portsea Castle, is an artillery fort originally constructed by Henry VIII on Portsea Island, Hampshire, in 1544. It formed part of the King's Device programme to protect against invasion from France and the Holy Roman Empire, and defended the Solent and the eastern approach to Portsmouth. The castle had a square central keep, two rectangular gun platforms to the east and west, and two angled bastions to the front and rear, and was an early English example of the trace italienne-style of fortification popular on the Continent. The Cowdray engraving of the Battle of the Solent in 1545 depicted Henry VIII visiting the castle. Despite several serious fires, it remained in service and saw brief action at the start of the English Civil War in 1642 when it was stormed by Parliamentary forces.
Portsmouth Harbour is a 1,264.2-hectare (3,124-acre)/12.6 km2 (4.9 sq mi) biological Site of Special Scientific Interest between Portsmouth and Gosport in Hampshire. It is a Ramsar site and a Special Protection Area.
Portsmouth Point, or "Spice Island", is part of Old Portsmouth in Portsmouth, Hampshire, on the southern coast of England. The name Spice Island comes from the area's seedy reputation, as it was known as the "Spice of Life". Men were easily found and press-ganged into Nelson's navy from Portsmouth Point due to its hostelries and for being where prostitutes plied their trade. The area forms the eastern side of the narrow entrance to Portsmouth Harbour, facing Gosport on the western side.
Landport is a district located on Portsea Island and is considered the city centre of modern-day Portsmouth, England. The district is centred around Commercial Road and encompasses the Guildhall, Civic Centre, Portsmouth and Southsea Station and Commercial Road central shopping area. The original historic old town of Portsmouth lies to the south of Landport and is now known as Old Portsmouth. The district of Portsea lies to the West; Somers Town and Southsea are to the south; Fratton lies to the East and the Kingston Crescent area to the north.
King James's and Landport Gates are two English Heritage gateways in Portsmouth, Hampshire, England.
Portsmouth is an island port city situated on Portsea Island in the county of Hampshire, England. Its history has been influenced by its association with the sea, and its proximity to London, and mainland Europe.
Portsbridge Creek, known officially as Portsea Creek, formerly as Portsea Lake and informally as Ports Creek, Port Creek, Portcreek and Canal Creek is a tidal waterway just off the southern coast of England that runs between Portsea Island and the mainland from Langstone Harbour to Tipner Lake.
Lumps Fort is a disused fortification built on Portsea Island as part of the defences for the naval base at Portsmouth.
The siege of Portsmouth was the siege of a Royalist garrison in Portsmouth by a Parliamentarian force conducted in the early part of the First English Civil War. The siege resulted in Portsmouth falling to Parliament after a little under a month of conflict.
The Gibraltar peninsula, located at the far southern end of Iberia, has great strategic importance as a result of its position by the Strait of Gibraltar where the Mediterranean Sea meets the Atlantic Ocean. It has repeatedly been contested between European and North African powers and has endured fourteen sieges since it was first settled in the 11th century. The peninsula's occupants – Moors, Spanish, and British – have built successive layers of fortifications and defences including walls, bastions, casemates, gun batteries, magazines, tunnels and galleries. At their peak in 1865, the fortifications housed around 681 guns mounted in 110 batteries and positions, guarding all land and sea approaches to Gibraltar. The fortifications continued to be in military use until as late as the 1970s and by the time tunnelling ceased in the late 1960s, over 34 miles (55 km) of galleries had been dug in an area of only 2.6 square miles (6.7 km2).