The Cathedral Church and Minor Basilica of the Immaculate Mother of God, Help of Christians is the cathedral church of the Roman Catholic Archdiocese of Sydney and the seat of the Archbishop of Sydney, currently Anthony Fisher OP. It is dedicated to the "Immaculate Mother of God, Help of Christians", Patroness of Australia and 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 . It is located on College Street near the eastern border of the Sydney central business district in the City of Sydney local government area of New South Wales, Australia. Despite the high-rise development of the central business district, the cathedral’s 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 who consecrated the new forward altar. The cathedral was designed by William Wardell and built from 1866 to 1928. It is also known as St Mary’s Catholic Cathedral and Chapter House, Saint Mary’s Cathedral and St Mary’s Cathedral. The property was added to the New South Wales State Heritage Register on 3 September 2004.

More details: https://en.wikipedia.org/wiki/St_Mary%27s_Cathedral%2C_Sydney