FEIS CEOIL (f ash kyol'), Irish musical festival, founded in 1897 and one of the best-established and most useful institu tions in Irish musical life. The study and cultivation of Irish music are especially aimed at, but not now, as at first, exclu sively, the ultra-particularist policy originally adopted in this respect having been wisely abandoned. The festival, which lasts a week, is held annually in Dublin in May, more or less on the lines of the English Competition Festivals. Similar competitions are also held at Londonderry and Sligo.