The history of Aberystwyth may be said to date from the time of Gilbert Strongbow, who in 1109 erected a fortress on the present Castle Hill.
Among the monuments is that of Strongbow, the invader of Ireland, to whom the earlier part of the superstructure (1170) is due.
The site chosen for it was that of the ancient priory of Kilmainham, founded by Strongbow for Knights Templars.
In 1176 Strongbow, earl of Pembroke, and chief leader of the Anglo-Norman forces, died in Dublin of a mortification in one of his feet, and was buried in Christ Church Cathedral, where his monument remains well preserved.
121 9 ?), Anglo-Norman conqueror of Ulster, was a member of a celebrated Norman family of Oxfordshire and Somersetshire, whose parentage is Unknown, and around whose career a mass of legend has grown up. It would appear that he accompanied William Fitz-Aldelm to Ireland when the latter, after the death of Strongbow, was sent thither by Henry II., and that he immediately headed an expedition from Dublin to Ulster, where he took Downpatrick, the capital of the northern kingdom.
To Richard Strongbow, earl of Pembroke and head of the house of Clare, Dermot gave his daughter Eva in marriage;.