The 'Register and Chronicle of the Abbey of Aberconway' records that Owain ap Gruffudd, prince of southern Powys and lord of Cyfeiliog, founded the abbey of Ystrad Marchell of the Cistercian Order in 1170 and cites the above Latin couplet as being the epitaph on his tomb which was situated on the north side of the high altar of the abbey church of his foundation and in which he was buried in 1197.