These are some of the questions that Donal Lunny sought the answers to following The Celtic Songlines series on RTE television. D[nal travelled to all of Europe's Celtic nations from the Hebrides in the north to Galicia in the south, visiting the Isle of Man, Wales, Cornwall and Brittany as well as Ireland.

Along the way he met with musicians, historians and folklorists who helped build a fascinating picture of what Celtic musical identity means in modern Europe.