We came across this interesting documentary which is worth a look.

A revival of Irish traditional music took place around the turn of the 20th century. After a lull in the 1940s and 1950s, when (except for Céilidh bands) traditional music was at a low ebb, Seán Ó Riada's The Chieftains, The Clancy Brothers and Tommy Makem, The Irish Rovers, The Dubliners, Ryan's Fancy and Sweeney's Men were in large part responsible for a second wave of revitalization of Irish folk music in the 1960s. They were followed by the likes of Planxty, The Bothy Band and Clannad in the 70s. Later came such bands as Stockton's Wing, De Dannan, Altan, Arcady, Dervish and Patrick Street, along with a wealth of individual performers.