The man appointed as successor in waiting to the Catholic Archbishop of Dublin, Cardinal Desmond Connell, has offered to work with survivors of clerical sexual abuse.
Archbishop Diarmuid Martin was speaking to a congregation in Dublin's Pro-Cathedral shortly after his appointment was confirmed.
In his new role as Coadjutor Archbishop, he will automotically succeed the Cardinal when the latter retires or dies.
Born in Dublin in 1945, Diarmuid Martin was ordained for the Dublin Diocese in May 1969.
In 1998 he was appointed a Bishop of the Roman Curia and three years later he became an Archbishop.
He has served as Secretary of the Pontifical Council for Justice and Peace, and has represented the Holy See at many international meetings and organisations.
The Taoiseach said he was delighted to learn of the appointment and said that the Pope had honoured Dublin by naming a pastor of international reputation as Coadjutor.
He said that Archbishop Martin was a notable and respected voice in the international arena due to his work in pursuit of justice and peace.
Meanwhile, Cardinal Desmond Connell has thanked Massgoers in the archdiocese for their generosity in boosting contributions to the weekly Share collection by over 6% last year.
Accounts for the 200 parishes for the year ending last June also show that the family offering collection grew by 9.5% and the collection for the support of priests grew by 10%.
The figures mark a continuation of the upward trend of church collections in Dublin.
The Share Collection rose by 2% in 1999, just under 4% in 2000, 7% in 2001 and just over 6% in 2002.