Magic lantern slide circa 1900.Victorian/Edwardian.Social History. ST Michaels Mount Cornwall,England.St Michael's Mount (Cornish: Karrek Loos yn Koos,[1] meaning 'hoar rock in woodland')[2] is a small tidal island in Mount's Bay, Cornwall, England, United Kingdom. The island is a civil parish and is linked to the town of Marazion by a man-made causeway of granite setts, passable between mid-tide and low water. The population of this parish in 2011 was 35.[3] It is managed by the National Trust, and the castle and chapel have been the home of the St Aubyn family since approximately 1650. The earliest buildings, on the summit, date to the 12th century.[4]