Garret Fitzgerald - the country's seventh Taoiseach - has passed away at the age of 85.
President Mary McAleese has led official tributes this morning - she's described him as one of our national treasures.
She says Dr Fitzgerald was the Renaissance man of our time and a true public servant who constantly strove to make Ireland a better place for all of it's people.
Fianna Fail leader Michael Martin says Dr Fitzgerald made an enormous contribution to Irish politics and our wider society.
Mr Martin has described him as a hard-working politician of compassion and ability, a prolific journalist of insight and understanding, and a brilliant academic of versatility and knowledge.
And he's paid tribute to his work in the peace process, saying he was a strong advocate of peace in Northern Ireland.
Meanwhile, Donegal South West Deputy and Junior Gaeltacht Minister Dinny Mc Ginley has said Garrett Fitzgerald was the reason he entered politics............