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Co-Patron of Calcutta Archdiocese

On 4 September 2017, during a celebration honouring the 1st anniversary of her canonisation, Sister Mary Prema Pierick, Superior-General of the Missionaries of Charity, announced that Mother Teresa would be made the co-patron of the Calcutta Archdiocese during a Mass in the Cathedral of the Most Holy Rosary on 6 September 2017. On 5 September 2017, Archbishop Thomas D'Souza, who serves as head of the Roman Catholic Archdiocese of Calcutta, confirmed that Mother Teresa would be named co-patron of the Calcutta Diocese, alongside Francis Xavier. On 6 September 2017, about 500 people attended the Mass at a cathedral where Dominique Gomes, the local Vicar General, read the decree instituting her as the second patron saint of the archdiocese. The ceremony was also presided over by D'Souza and the Vatican's ambassador to India, Giambattista Diquattro, who lead the Mass and inaugurated a bronze statue in the church of Mother Teresa carrying a child.

The Catholic Church declared St. Francis Xavier the first patron saint of Calcutta in 1986.