Congress General Secretary David Begg has expressed his deep sadness at the passing of Donal Nevin, a former General Secretary of the Irish Congress of Trade Unions.
Mr Begg paid tribute to Mr Nevin and described him as "a man of huge integrity and dedication to the advancement and betterment of working people and of the Irish labour movement.
"Donal Nevin was a remarkable individual who was possessed of a sharp and rigorous intellect and a keen strategic vision. He is someone to whom the modern trade union movement is deeply indebted.
"He was a man of great honour and his loss will be deeply felt by all.
"On behalf of the Irish Congress of Trade Unions and the wider trade union movement, I would like to extend our condolences and deepest sympathies to Mr Nevin's family," he said.
Earlier this year Congress established the Nevin Economic Research Institute, a progressive economic think tank named in honour of the former ICTU General Secretary.