James Robert Knox GCC was an Australian prelate of the Catholic Church. After years as a Vatican diplomat, he served as Archbishop of Melbourne from 1967 to 1974, prefect of the Congregation for Divine Worship and the Discipline of the Sacraments from 1974 to 1981, and president of the Pontifical Council for the Family from 1981 until his death in 1983. Created a cardinal in 1973, he was the first Australian to serve in the Roman Curia.

The Archdiocese of Melbourne is a Latin Rite metropolitan archdiocese in Melbourne, Victoria, Australia. Erected initially in 1847 as the Diocese of Melbourne, a suffragan diocese of Archdiocese of Sydney, the diocese was elevated in 1874 as an archdiocese of the Ecclesiastical Province of Melbourne and is the metropolitan for the suffragan dioceses of Sale, Sandhurst, Ballarat, and the Ukrainian Catholic Eparchy of Ss Peter and Paul. The Archdiocese of Hobart is attached to the archdiocese for administrative purposes. St Patrick's Cathedral is the seat of the Archbishop of Melbourne, currently Peter Comensoli, who succeeded Denis Hart on 1 August 2018.