This tower house was once occupied by the Cistercian Monks of St. Mary's Abbey, Dublin and all fishing boats entering the harbour of Malahide gave a donation of fish to the monks. They also benefited from ship-wrecks. When the monasteries were suppressed by Henry VIII, he granted Robswalls to his Solicitor-General for Ireland, Patrick Barnewell C.1540. At one time it had its own small harbour hewn out of the rocks underneath and had a three-storied circular staircase. It is minus a storey to-day.