What is recorded here

Castle John stands beside Lough Scur in County Leitrim, joining three crannogs and a causeway as one of the lake’s protected features. The water has touched human life since the New Stone Age, and the castle still marks that old boundary between land and lake. Its name suggests John, but no clearer story survives in the facts provided.

Castle John is recorded as a castle in County Leitrim. Its open map record supplies this location and any linked names or public references.

Built in the 13th century by the MacDermotts of Leitrim, Castle John is remembered as a significant medieval stronghold in western Ireland, reflecting the power and territorial divisions of Gaelic chieftains during the Anglo-Norman period.