Mrs Maureen Haughey has passed away, aged 91.
The wife of the late Taoiseach Charles passed away peacefully after a short illness early this morning.
She was the daughter of Sean Lemass, also a former taoiseach, and the mother of Seán Haughey, a Fianna Fáil TD for Dublin North Central.
Mr Seán Haughey tweeted this morning; "So sad to announce that my mother passed away peacefully this morning - A truly remarkable woman. May she rest in peace."
So sad to announce that my mother passed away peacefully this morning-A truly remarkable woman.May she rest in peace pic.twitter.com/aJRIoHPUJi— Sean Haughey (@sean_haughey) March 17, 2017
Fianna Fáil Leader Micheál Martin TD shared his condolences on behalf of the party with the family and described Mrs Haughey as a "wonderfully warm, dignified and intelligent woman."
"She was a tower of strength to her late husband former Taoiseach Charles Haughey and loving daughter of former Taoiseach Seán Lemass.
"Throughout her distinguished life she witnessed some of the major turning points in Irish history.
"Maureen was a very active woman and kept a keen interest in the evolution of Irish society. She was a patriot who loved her country and retained a key interest in the development of Irish society," he continued.
"I knew Maureen personally for many years and I enjoyed her company whenever we met. She was very knowledgeable, wise and engaging.
"At the launch of the Fianna Fáil 1916 commemorations at the RCSI over a year ago she made a poignant contribution recalling her late fathers heroic role in the 1916 Rising and subsequent War of Independence.
"Maureen was particularly pleased to witness her son Seán’s re-election to Dáil Éireann during last year’s General Election.
"Her life was steeped in the cause of Irish republicanism and her family contributed significantly to its advancement. She was a loving and caring mother and our sympathies go to her family, Eimear, Conor, Ciaran, and Seán.
"Ar Dheis Dé go raibh a hanam dhílis."