Bishop Coll will be officially ordained on Sunday, and Archbishop Dermot Farrell will be the Chief Ordaining Prelate.
The new Bishop in the Diocese of Ossory will be ordained this weekend.
Niall Coll, who's 59 years old, was appointed to the role by Pope Francis at the end of October.
The Donegal man spent three years as a lecturer in St Patrick’s College in Carlow in the mid 1990s.
He is the Parish Priest in Tawnawilly and Clar in the the Diocese of Raphoe.
He will be officially ordained on Sunday, and Archbishop Dermot Farrell will be the Chief Ordaining Prelate.
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