Qualla: Castle Cornet

Castle Cornet: Introduction

Wed, 20 May 2026 00:00:00 GMT

Photo credit Man vyi, Public domain. For nine years between 1643 and 1651, while the rest of Guernsey declared for Parliament, the soldiers inside Castle Cornet kept the King's flag flying. They were besieged, bombarded, and forgotten. Roughly ten thousand cannonballs were fired at the town of St Peter Port during those years - most of them launched from this small stone island a few hundred meters offshore. Castle Cornet was one of the last Royalist holdouts in the entire English Civil War. It also lost its central keep in 1672 when the gunpowder magazine inside exploded, taking the medieval tower with it. There is a lot of story compressed into two hectares of rock.

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Image: Man vyi | Public domain

Castle Cornet: A Tidal Island Becomes a Fortress

Wed, 20 May 2026 00:00:00 GMT

Photo credit Man vyi, Public domain. Castle Cornet sits 600 meters east of Guernsey's coast, a flattened oval of rock 175 meters long and 130 meters wide. Until 1859, when it became part of the breakwater of St Peter Port harbor, it was a true tidal island - cut off twice a day by the rising sea. Fortification began...

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Image: Man vyi | Public domain

Castle Cornet: The French Massacre and the Long Recovery

Wed, 20 May 2026 00:00:00 GMT

Photo credit User:Man vyi, Public domain. In 1338, in the opening years of what would become the Hundred Years' War, a French force seized Guernsey and besieged Cornet. The castle fell on 8 September. The French then massacred the garrison - eleven men-at-arms and fifty archers, killed after surrender. Guernsey was retak...

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Image: User:Man vyi | Public domain

Castle Cornet: Royalists on a Rock

Wed, 20 May 2026 00:00:00 GMT

Photo credit Surgeonsmate at English Wikipedia, CC BY-SA 3.0. When the English Civil War broke out in 1642, Guernsey overwhelmingly sided with Parliament. The garrison of Castle Cornet did not. Sir Peter Osborne, the King's governor, refused to surrender. For nine years his small force held out, supplied by sea from Royalist Jersey, while P...

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Image: Surgeonsmate at English Wikipedia | CC BY-SA 3.0

Castle Cornet: The Keep That Wasn't There Anymore

Wed, 20 May 2026 00:00:00 GMT

Photo credit The original uploader was Sgfoote at English Wikipedia., Public domain. Then came 1672. On the night of 29 December, lightning struck the powder magazine inside the castle's medieval keep, and the keep itself simply ceased to exist in the explosion that followed. A 1672 engraving made before the disaster shows the tall central tower that had defined ...

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Image: The original uploader was Sgfoote at English Wikipedia. | Public domain