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One of Ulster's most evocative medieval ruins, Dundrum Castle was founded by the legendary Norman adventurer John de Courcy following his invasion of Ulster in 1177.
The stone curtain wall of the outer bailey is likely to have been built by the Maginnis family, who seized Dundrum in the late fourteenth century and held it intermittently until finally expelled by Lord Mountjoy in 1601.
The Maginnis family retrieved Dundrum in 1642, but later lost it to the Parliamentarians, who dismantled the castle in 1652 after they withdrew their garrison.