Portland has been inhabited since at least the
Mesolithic period (the Middle
Stone Age)—there is archaeological evidence of Mesolithic inhabitants at the
Culverwell Mesolithic Site, near
Portland Bill, and of habitation since then. The Romans occupied Portland, reputedly calling it
Vindelis. when they destroyed the
abbey on
Lindisfarne, their first documented landing occurred in Portland four years earlier, in 789, as recorded in the
Anglo-Saxon Chronicle. Three lost Viking ships from
Hordaland (the district around
Hardanger fjord in west
Norway) landed at Portland Bill. The king's
reeve tried to collect taxes from them, but they killed him and sailed on. A castle on the site of the present
Rufus Castle, standing over
Church Ope Cove, may have been built for
William II of England (also known as William Rufus) soon after the conquest of England by his father
William the Conqueror. None of that castle remains; the existing castle probably dates from the 15th century. was built to defend Portland in the 16th century. In 1539
King Henry VIII ordered the construction of
Portland Castle for defence against attacks by the French; the castle cost £4,964 (equivalent to £ in ). It is one of the best preserved castles from this period, and is opened to the public by the custodians
English Heritage. In the 17th century, chief architect and Surveyor-General to James I,
Inigo Jones, surveyed the area and introduced the local
Portland stone to London, using it in his
Banqueting House, Whitehall, and for repairs on
Old St Paul's Cathedral. His successor, Sir
Christopher Wren, an architect and the Member of Parliament for nearby Weymouth, used six million tons of white Portland limestone to rebuild destroyed parts of the capital after the
Great Fire of London of 1666. Well-known buildings in the capital, including St Paul's Cathedral and the eastern front of
Buckingham Palace feature the stone. After the First World War, a
quarry was opened by
The Crown Estate to provide stone for the
Cenotaph in
Whitehall and half a million gravestones for war cemeteries, and after the Second World War hundreds of thousands of gravestones were hewn for soldiers who had fallen on the
Western Front. There have been railways in Portland since the early 19th century. The
Merchant's Railway was the earliest—it opened in 1826 (one year after the
Stockton and Darlington railway) and ran from the quarries at the north of
Tophill to a pier at
Castletown, from where the Portland stone was shipped around the country. The
Weymouth and Portland Railway was laid in 1865, and ran from a station in
Melcombe Regis, across the Fleet and along the low isthmus behind Chesil Beach to a station at
Victoria Square in
Chiswell. At the end of the 19th century the line was extended to the top of the island as the Easton and Church Ope Railway, running through Castletown and ascending the cliffs at East Weares, to loop back north to a station in
Easton.
Coastal flooding has affected Portland's residents and transport for centuries—the only way off the island by land is along the causeway in the lee of Chesil Beach. At times of extreme floods (about every 10 years) this road link is cut by floods. The low-lying village of
Chiswell used to flood on average every 5 years. Chesil Beach occasionally faces severe storms and massive waves, which have a
fetch across the Atlantic Ocean. Following two severe flood events in the 1970s,
Weymouth and Portland Borough Council and
Wessex Water decided to investigate the structure of the beach, and
coastal management schemes that could be built to protect Chiswell and the beach road. In the 1980s it was agreed that a scheme to provide storm protection with a 20%
annual exceedance probability to reduce flood depth and duration in more severe storms. to the north of Chiswell, an extended
sea wall in
Chesil Cove, and a
culvert running from inside the beach, underneath the beach road and into
Portland Harbour, to divert flood water away from low-lying areas.
Portland Harbour was formed (1848–1905) by the construction of breakwaters, but before that the natural anchorage had hosted ships of the
Royal Navy for more than 500 years. It was "the home of the Asdics," a centre for Admiralty research into
asdic submarine detection and underwater weapons from 1917 to 1998; the shore base
HMS Serepta was renamed
HMS Osprey in 1927. During the Second World War Portland was the target of 48 air raids and a total of 532 bombs, although most warships had moved north as Portland was within enemy striking range across the Channel.
Mulberry Harbour Phoenix Units can be seen at Black Barge beach, near
Portland Castle. Portland was a major embarkation point for Allied forces on
D-Day in 1944. Early
helicopters were stationed at Portland in 1946–1948, and in 1959 a shallow tidal flat, The Mere, was infilled, and sports fields taken to form a heliport. The station was formally commissioned as HMS Osprey, which then became the largest and busiest military helicopter station in Europe. The base was gradually improved with additional landing areas and one of England's shortest runways, at . MRCC Portland's area of responsibility extended midway across the
English Channel, and from
Start Point in Devon to the Dorset/
Hampshire border, covering an area of around . The 12 Search and Rescue teams in the Portland area dealt with almost 1000 incidents in 2005. Portland lends its name to one of the
BBC's
Shipping Forecast regions. There are still two prisons on Portland:
HMP The Verne, which until 1949 was a Victorian military fortress, and a Young Offenders' Institution (
HMYOI) on the Grove clifftop. This was the original prison (
HM Prison Portland) built for convicts who quarried stone for the Portland Breakwaters from 1848. For a few years until 2005 Britain's only
prison ship,
HMP The Weare, was berthed in the harbour. shown in Dorset == Governance ==