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, making Portsmouth the only city in England not located primarily on the mainland. The city is located south-east of Southampton, west of Brighton and Hove, and south-west of London. With a population last recorded at 208,100, it is the most densely populated city in the United Kingdom. Portsmouth forms part of the South Hampshire urban area with Gosport, Fareham, Havant, Eastleigh and Southampton.

Portsmouth's history can be traced to Roman times and it has contained a significant Royal Navy dockyard and base for centuries. Portsmouth was founded by Anglo-Norman merchant Jean de Gisors in the south-west area of Portsea Island, a location now known as Old Portsmouth. Around this time, de Gisors ordered the construction of a chapel dedicated to St Thomas Becket. This became a parish church by the 14th century. Portsmouth was established as a town with a royal charter on 2 May 1194. The city is home to the first drydock ever built. It was constructed on the orders of Henry VII in 1496.

Portsmouth has the world's oldest dry dock currently in use, "The Great Stone Dock"; originally built in 1698, rebuilt in 1769 and presently known as "No.5 Dock". The world's first mass production line was established at the naval base's Block Mills which produced pulley blocks for the Royal Navy. By the early-19th century, Portsmouth was the most heavily fortified city in the world, and was considered "the world's greatest naval port" at the height of the British Empire throughout Pax Britannica. By 1859, a ring of defensive land and sea forts, known as the Palmerston Forts, had been built around Portsmouth in anticipation of an invasion from continental Europe.

Portsmouth achieved city status on 21 April 1926. During the Second World War the city was bombed extensively in the Portsmouth Blitz, which resulted in the deaths of 930 people, and it was a pivotal embarkation point for the D-Day landings. In 1982 a British task force departed from Portsmouth to serve in the Falklands War. HMY Britannia was formerly based in Portsmouth and oversaw the transfer of Hong Kong in 1997, after which Britannia was retired from royal service, decommissioned and relocated to Leith as a museum ship.

HMNB Portsmouth is an operational Royal Navy base and is home to two thirds of the UK's surface fleet. The base has long had the nickname Pompey, which it shares with the wider city of Portsmouth and Portsmouth Football Club. The naval base also contains the National Museum of the Royal Navy and Portsmouth Historic Dockyard, which has a collection of historic warships, including the Mary Rose, Lord Nelson's flagship, (the world's oldest naval ship still in commission), and , the Royal Navy's first ironclad warship.

The former shore establishment has been redeveloped into a large retail outlet destination known as Gunwharf Quays which opened in 2001. Portsmouth is among the few British cities with two cathedrals: the Anglican Cathedral of St Thomas and the Roman Catholic Cathedral of St John the Evangelist. The waterfront and Portsmouth Harbour are dominated by the Spinnaker Tower, one of the United Kingdom's tallest structures at .

Southsea is Portsmouth's seaside resort, which was named after Southsea Castle. Southsea has two piers; Clarence Pier amusement park and South Parade Pier. The world's only regular hovercraft service operates from Southsea Hoverport to Ryde on the Isle of Wight. Southsea Common is a large open-air public recreation space which serves as a venue for a wide variety of annual events.

The city has several mainline railway stations that connect to London Victoria and London Waterloo amongst other lines in southern England. Portsmouth International Port is a commercial cruise ship and ferry port for international destinations. The port is the second busiest in the United Kingdom after Dover, handling around three million passengers a year. The city formerly had its own airport, Portsmouth Airport, until its closure in 1973. The University of Portsmouth enrolled 23,000 students.

Portsmouth is the birthplace of notable people such as author Charles Dickens, engineer Isambard Kingdom Brunel, former Prime Minister James Callaghan, actor Peter Sellers and author-journalist Christopher Hitchens.

History

Early history

The Romans built Portus Adurni (now called Portchester Castle), a fort, at nearby Portchester in the late 3rd century. The city's Old English (Anglo-Saxon) name, "Portesmuða", is derived from port (a haven) and muða (the mouth of a large river or estuary). In the Anglo-Saxon Chronicle, a warrior named Port and his two sons killed a noble Briton in Portsmouth in 501. Winston Churchill, in A History of the English-Speaking Peoples, wrote that Port was a pirate who founded Portsmouth in 501.

England's southern coast was vulnerable to Danish Viking invasions during the eighth and ninth centuries, and was conquered by Danish pirates in 787. In 838, during the reign of Æthelwulf, King of Wessex, a Danish fleet landed between Portsmouth and Southampton and plundered the region. Æthelwulf sent Wulfherd and the governor of Dorsetshire to confront the Danes at Portsmouth, where most of their ships were docked. Although the Danes were driven off, Wulfherd was killed. The Danes returned in 1001 and pillaged Portsmouth and the surrounding area, threatening the English with extinction. They were massacred by the English survivors the following year; rebuilding began, although the town experienced further attacks until 1066.

Norman to Tudor

Although Portsmouth was not mentioned in the 1086 Domesday Book, Bocheland (Buckland), Copenore (Copnor), and Frodentone (Fratton) were. According to some sources, it was founded in 1180 by the Anglo-Norman merchant Jean de Gisors.

King Henry II died in 1189; his son, Richard I (who had spent most of his life in France), arrived in Portsmouth en route to his coronation in London. When Richard returned from captivity in Austria in May 1194, he summoned an army and a fleet of 100 ships to the port. Richard gave Portsmouth market-town status with a royal charter on 2 May, authorising an annual fifteen-day free-market fair, weekly markets and a local court to deal with minor matters, and exempted its inhabitants from an £18 annual tax. The 1194 royal charter's 800th anniversary was celebrated in 1994 with ceremonies at the city museum.

King John reaffirmed RichardI's rights and privileges, and established a permanent naval base. The first docks were begun by William of Wrotham in 1212, and John summoned his earls, barons, and military advisers to plan an invasion of Normandy. In 1229, declaring war against France, HenryIII assembled a force described by historian Lake Allen as "one of the finest armies that had ever been raised in England". The invasion stalled, and returned from France in October 1231. HenryIII summoned troops to invade Guienne in 1242, and Edward I sent supplies for his army in France in 1295. Commercial interests had grown by the following century, and its exports included wool, corn, grain, and livestock.

Edward II ordered all ports on the south coast to assemble their largest vessels at Portsmouth to carry soldiers and horses to the Duchy of Aquitaine in 1324 to strengthen defences. A French fleet commanded by David II of Scotland attacked in the English Channel, ransacked the Isle of Wight and threatened the town. Edward III instructed all maritime towns to build vessels and raise troops to rendezvous at Portsmouth. Two years later, a French fleet led by Nicholas Béhuchet raided Portsmouth and destroyed most of the town; only the stone-built church and hospital survived. After the raid, EdwardIII exempted the town from national taxes to aid its reconstruction. In 1377, shortly after Edward died, the French landed in Portsmouth. Although the town was plundered and burnt, its inhabitants drove the French off to raid towns in the West Country.

Henry V gathered his forces in Portsmouth for an invasion of France in 1415, it was while staying at Portchester Castle that the Southampton plot was uncovered. This campaign would culminate with victory at the battle of Agincourt. He also built Portsmouth's first permanent fortifications. In 1416, a number of French ships blockaded the town (which housed ships which were set to invade Normandy); Henry gathered a fleet at Southampton, and invaded the Norman coast in August that year. Recognising the town's growing importance, he ordered a wooden Round Tower to be built at the mouth of the harbour; it was completed in 1426. Henry VII rebuilt the fortifications with stone, assisted Robert Brygandine and Sir Reginald Bray in the construction of the world's first dry dock, and raised the Square Tower in 1494. He made Portsmouth a Royal Dockyard, England's only dockyard considered "national". Although King Alfred may have used Portsmouth to build ships as early as the ninth century, the first warship recorded as constructed in the town was the Sweepstake (built in 1497).

Henry VIII built Southsea Castle, financed by the Dissolution of the Monasteries, in 1539 in anticipation of a French invasion. He also invested heavily in the town's dockyard, expanding it to . Around this time, a Tudor defensive boom stretched from the Round Tower to Fort Blockhouse in Gosport to protect Portsmouth Harbour.

From Southsea Castle, Henry witnessed his flagship Mary Rose sink in action against the French fleet in the 1545 Battle of the Solent with the loss of about 500 lives. Some historians believe that the Mary Rose turned too quickly and submerged her open gun ports; according to others, it sank due to poor design. Portsmouth's fortifications were improved by successive monarchs. The town experienced an outbreak of plague in 1563, which killed about 300 of its 2,000 inhabitants.

Stuart to Georgian

In 1623, Charles I (then Prince of Wales) returned to Portsmouth from France and Spain. His unpopular military adviser, George Villiers, 1st Duke of Buckingham, was stabbed to death in an Old Portsmouth pub by war veteran John Felton five years later. Felton never attempted to escape, and was caught walking the streets when soldiers confronted him; he said, "I know that he is dead, for I had the force of forty men when I struck the blow". Felton was hanged, and his body chained to a gibbet on Southsea Common as a warning to others. The murder took place in the Greyhound public house on High Street, which is now Buckingham House and has a commemorative plaque.

Most residents (including the mayor) supported the parliamentarians during the English Civil War, although military governor Colonel Goring supported the royalists. The town, a base of the parliamentarian navy, was blockaded from the sea. Parliamentarian troops were sent to besiege it, and the guns of Southsea Castle were fired at the town's royalist garrison. Parliamentarians in Gosport joined the assault, damaging St Thomas's Church. On 5 September 1642, the remaining royalists in the garrison at the Square Tower were forced to surrender after Goring threatened to blow it up; he and his garrison were allowed safe passage out of the city.

After the end of the Civil War, Portsmouth was among the first towns to declare CharlesII king and began to prosper. The first ship built in over 100 years, , was launched in 1650; twelve ships were built between 1650 and 1660. Under the Commonwealth of England, Robert Blake used the harbour as his base during the First Anglo-Dutch War in 1652 and the Anglo-Spanish War. He died within sight of the town, returning from Cádiz in 1657. After the Restoration, CharlesII married Catherine of Braganza at the Royal Garrison Church on 14 May 1662. Catherine was reputed to have introduced the cultural practice of tea drinking to England at this event.