The leading Irish music and composer Mícheál Ó Súilleabháin died at the age of 67.
Native of Clonmel, Co Tipperary, was Emeritus Professor of Music at the University of Limerick and founder and director of the Irish World Academy for Music and Dance.
He collaborated with the RTE orchestra and the sender said he was celebrated for his "fusion of Irish traditional and classical music, especially for his unique style of piano play".
He left last night at Milford Hospice in Limerick.
A number of well-known musicians and academics, University of Limerick students and fans celebrated the music online.
Orchestral musician Liam Lawton acclaimed, wrote; "Tonight one of the great legends of Irish music has gone to his everlasting reward." Micheal O Suilleabhain was a unique artist whose music collected so many strings of Irish music.
"His vision and talent created a path that so many of us traveled over the years, but nobody could ever imitate the gift that was Micheal O Suilleabhain. His music shone a niche that will remember long after all of us."
The Irish Chamber Orchestra wrote; "It is with a heartfelt heart that we at ICO have learned that Mícheál O Suilleabhain, musician, composer, leader and good friend has passed.
"Mícheál was involved in moving the orchestra to Limerick and ICO is an integral part of the Irish World Academy founded by Mícheál.
"We extend our deepest sympathies with Helen, Eoin, Moley, Luke and Noirin at their terrible loss. Can he rest in peace."
Tipperary County Councilor Siobhan Ambrose described the "Suilleabháin" as a "celebrated Irish musician, artist and composer."
She wrote; "It's very sad that I've only heard that one of Clonmel's most famous sons Micheal O & Suilleabháin passed.
"Micheal went away tonight at Milford Hospice in Limerick … He was a very proud Clonmel man."