The Cathedral Church and Minor Basilica of the Immaculate Mother of God, Help of Christians (colloquially, St Mary's Cathedral) is the cathedral church of the Roman Catholic Archdiocese of Sydney and theseat of the Archbishop of Sydney, currently Anthony Fisher OP. The cathedral is dedicated to the "Immaculate Mother of God, Help of Christians", Patroness of Australia. St Mary's holds the title and dignity of a minor basilica, bestowed upon it by Pope Pius XI on 4 August 1932.
St Mary's has the greatest length of any church in Australia (although it is neither the tallest nor the largest overall). It is located on College Street in the heart of the City of Sydney where, despite the high rise development of the Sydney central business district (CBD), its imposing structure and twin spires make it a landmark from every direction. In 2008, St Mary's Cathedral became the focus of World Youth Day 2008 and was visited by Pope Benedict XVI.