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The main piece she will be performing is The Proclamation composed by Patrick Cassidy.
Patricia will be playing a 315-year-old Stradivarius violin, from Joe Bein and Company in Chicago, which is estimated to be worth $4m (€3.3m).
She will also join Soprano Renée Fleming for On Eagle’s Wings Schubert’s Ave Maria and the Celtic Alleluia.
“I have been told, this will be the only live music event on the day,” she added.
Patricia from Blackrock, Co Louth, has played for the president-elect on a number of occasions, including when he visited his ancestral home in 2016.
She was also asked to perform at some of the Biden rallies in Chicago and other cities.
An Irish concert violinist has said she feels hugely honoured to be playing during a private Mass for US President-elect Joe Biden and his family before his inauguration tomorrow.
There had been concerns that there would not be any live music at the Mass because of the riots at the Capitol earlier this month.
The invitation for Patricia Treacy to play on inauguration day came directly to her from the Biden family last year.
She said: I am going to be playing in the church with the family present.
Over the weekend she practiced in Chicago for what she described as a once in a lifetime opportunity.