Only fragments of artefacts survive from the Brythonic speaking kingdoms of southern Scotland. Pictish art can be seen in the extensive survival of carved Pictish stones, particularly in the north and east of the country. These display a variety of recurring images and patterns, as at Dunrobin (Sutherland) and Aberlemno (Angus). There are a few survivals of Pictish silver, notably a number of massive neck-chains including the Whitecleuch Chain, and also the unique silver plaques from the cairn at Norrie's Law. Irish-Scots art from the kingdom of Dál Riata is much more difficult to identify, but may include items such as the Hunterston brooch, which with other items such as the Monymusk Reliquary, suggest that Dál Riata was one of the places, as a crossroads between cultures, where the Insular style developed. Early examples of Anglo-Saxon art include metalwork, particularly bracelets, clasps and jewellery, that has survived in pagan burials and in exceptional items such as the intricately carved whalebone Franks Casket, thought to have been produced in Northumbria in the early eighth century, which combines pagan, classical and Christian motifs. After the Christian conversion of what is now Scotland in the seventh century, artistic styles in Northumbria interacted with those in Ireland and Scotland to become part of the common style historians have identified as insular or Hiberno-Saxon.