Greencastle, County Down

It was originally surrounded by outer rectangular walls with four corner towers (ruins of some remain).

According to the information boards at the site it was held for the English Crown by Richard de Burgh, Earl of Ulster, from 1264 to 1333.

This was in spite of one of Richard de Burgh's daughters having married Robert the Bruce himself.

It fell into disuse after a bombardment by Cromwellian soldiers, to stop it being used by rebel forces.

The castle is a state-care historic monument in the townland of Greencastle, in the Newry and Mourne District Council area, at grid ref: J2473 1184.