He took over running Slane Castle in County Meath in 1976, and transformed it into a music venue which has since welcomed the likes of The Rolling Stones, Bob Dylan, and Queen.
Lord Henry Mount Charles - best known for bringing rock concerts to Slane Castle - has died.
He passed away peacefully last night at the age of 74, following a long battle with cancer.
He took over running Slane Castle in County Meath in 1976, and transformed it into a music venue which has since welcomed the likes of The Rolling Stones, Bob Dylan, and Queen.
His family says he leaves behind "an extraordinary legacy", with his "visionary leadership" touching countless lives.

Sharp Rise In M9 Collisions With Garda Call-Outs Up Year-On-Year
Councillor Seeks Clarity On How Often Nightclubs and Late Bars In Naas Are Inspected For Fire Risks
New Figures From CSO Reveal How Much International Protection Applicants Earn Compared To Average Worker In Ireland
Unpaid Eight-Month Work And Training Placement For Adults With Disabilities Branded "Extremely Unfair"
Department Of Education Defends Kildare SNA Cuts Amid Claims Of Reduced Need At Some Schools
Naas Nurses Threaten Escalation As Staffing Row Deepens
Driving Tests Face Disruption As RSA Testers To Strike Next Week
Jury Delivers Not Guilty By Reason Of Insanity Verdict In Ballyfin Demesne Strangling Case