Willie Clancy Summer School
The Willie Clancy Summer School (Irish: Scoil Samhraidh Willie Clancy) in Ireland is the world's largest traditional music summer school, held annually since 1973 in memory of the uilleann piper Willie Clancy. During the week, nearly a thousand students from all over the world attend daily classes taught by experts in Irish music and dance.
Source: Wikipedia — Willie Clancy Summer School (CC BY-SA 4.0)