The death has taken place of Sheila Conroy, the first woman to be elected to The National Executive Council of the Irish Transport & General Workers' Union.
Ms Conroy was also chairperson of RTÉ in the 1970s.
Tánaiste Eamon Gilmore described her as a lifelong heroine of the trade union and labour movement who made a huge contribution to changing Irish society.
Congress General Secretary David Begg also paid tribute to her “lifelong service and dedication to the labour movement".