Portland in Dorset is not an island but an isthmus, as it remains connected to the mainland by a narrow spit of land. It is 4.5 miles long and 1.7 miles wide and rises to 400 ft above sea level at the northern end.
It is a large piece of limestone of exceptional quality and is much in demand as building stone. Portland stone was used By Sir Christopher Wren for the rebuilding of London, including St Paul’s Cathedral and around 50 other churches, following the Great Fire in 1666. It was also used for the Cenotaph in Whitehall; War grave headstones in France and Belgium and the UN building in New York.
It has a strong military connection dating from 1539 when Henry VIII built a castle on…
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