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4 Newtown, Dunsoghly, Saint Margarets, Dublin, Republic of Ireland
The castle was built by Sir Thomas Plunkett probably some time around the middle of the 15th century. It consists of a central block, four storeys high and square corner towers, which have corbelled roofing.
The wooden roof on the top floor, which has been partially replaced, is the last original 15th to 16th century roof in the country to survive. It served as a model for the modern reconstructed roofs at Rothe House, Kilkenny and Bunratty Castle, County Clare.
Just to the south of the castle is a small chapel which has lost its chancel and which bears over its north doorway a representation of the Instruments of the Passion inscription 'I P M D D S' and the date 1573. Parts of the old bawn of the castle are incorporated in a neighbouring farm building.