The history of the Frankish county in the 8th and 9th centuries is not well known. In the Carolingian age, it may have formed the westernmost extent of non-Basque settlement in the Pyrenees. It was affected by the second wave of monasticism which swept Catalonia in the first half of the 9th century and saw the foundation and imperial recognition of new monasteries, as at Saint-Genesius des Fonts, Saint-Clement de Regulla, and Saint-André de Sureda in 819 and 823 respectively. In 859–860, a fleet of Vikings under Hasting and Bjorn plundered the abbeys of Roussillon before wintering in the Camargue.