 According to the Cistercian monk and hagiographer of St Kentigern, Jocelin of Furness, King Rhydderch had a residence in 'Pertnech' (Partick).Some archaeologists have deduced that the royal Partick estate was part of a larger elite centre of the kingdom, which included the ecclesiastical establishment just across the River Clyde at Govan.Partick and Govan may have come to prominence as a political centre following the Vikings' sack of Dumbarton in 870.