King John is believed to have granted Glenarm a municipal charter in the 13th century which makes Glenarm one of the oldest chartered villages in Ireland. The original castle here was leased to the Bisset's by the Bishop of Down and Connor in 1270, this could, therefore, have been a 12th century Norman castle, as their presence here makes sense with a harbour and short sea crossing to Scotland. A striking feature of the main village is the architecture, dating from the 17th century onward and well deserving of its designated conservation status. A walk through the village is highly recommended