Built in the 13th century by Anglo-Norman lord Thomas FitzAnthony on the west bank of the River Nore at Thomastown, this rectangular castle remained in good condition until the early 19th century. Its ruined walls are a prominent riverside landmark on the approach to the medieval walled town.
Visiting Grennan Castle
Ruin, viewable from public road/riverside
"Built in the 13th century by Anglo-Norman lord Thomas FitzAnthony on the west bank of the River Nore at Thomastown, this rectangular castle remained in good condition until the early 19th century."
Where to stay nearby
The closest castle hotel is Waterford Castle, 33.02 km away in Ballinakill (The Island), Waterford City — 16th-century stone castle built by the Fitzgerald family (granted the land in the 12th century), later enhanced in the 19th century with Gothic wings; sits on a private 310-acre island reached only by car ferry.
Nearest castle hotel · 33.02 km
Waterford Castle
Ballinakill (The Island), Waterford City, Co. Waterford · 4-star
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