Fort Regent, Military fortification on Mont de la Ville, Saint Helier, Jersey

Fort Regent is a fortification on Mont de la Ville in St. Helier, begun in 1806 to a design credited to Lieutenant-General John Humfrey. Its west side has a 5.5-m-thick curtain wall between the West Bastion and Northwest Redan; two bastions and four redans face all approaches. A 210-m glacis at the south end holds the only road and foot access, and the central parade ground is now roofed.

Construction began in 1806 during the Napoleonic Wars, employing around 800 workers and Royal Engineers until completion in 1814. The project reflected Britain's military strategy to protect the islands from French invasion.

Workmen levelling the hill for a parade ground in 1785 uncovered a dolmen, a prehistoric stone tomb. Governor Henry Seymour Conway was given it and in 1788 had it moved to his home at Park Place, near Henley-on-Thames, so the monument now stands in England.

The site now operates as a leisure center with sports facilities and entertainment spaces accessible via pathways from Saint Helier. Comfortable shoes are recommended since the grounds are hilly with multiple levels to explore.

Between December 1806 and October 1808, sappers blasted a shaft about 71 m deep and 8 ft wide through hard Jersey granite, believed to be the island's deepest well-shaft apart from artesian bores. When the charge broke into the spring 221 ft below the well-curb, water surged up while miners hung in a basket halfway up the shaft; the engineer in charge recorded the difficulty of hauling them out before they drowned.