The name Grosnez comes from the old Norse words for ‘grey headland’ – grar nes which is an accurate description of the site when seen from the sea.
PC Elizabeth Longbottom
It was built by Sir John des Roches around 1330, with its purpose being to provide the local farmers with a place of safey from French attacks. The French captured however the castle in 1373 and 1381 and was probably demolished around the time of the French occupation of Jersey (1461–1468). Archaeologists who have studied the ruins suggest that the castle was deliberately destroyed, rather than left to crumble over time.
Photo Credit James Bedding
The castle’s position on a clifftop some 60 metres above the sea means that the natural features of the site protect it on three sides. A ditch dug into the rock provides protection on the fourth side. The remains of ruined walls, mostly footings, are still present. A drawbridge and portcullis protected the gatehouse, which is the only substantial surviving remnant, and would have made it difficult to capture. 
Photo Credit Jill Browne
Visitors to Grosnez Castle are able to freely explore the ruins and it offers some fantastic views across to the other Channel Islands, whild also providing some beautiful sunsets.
PC Kevin Cronin
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- PC Paul Lakeman
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