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 the seat of the Archbishop of Sydney, currently . 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 (although it is neither the tallest nor largest overall). 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. History Background Sydney was established as a penal settlement on 26 January 1788 in the name of King George III by Captain Arthur Phillip, for prisoners transported from Britain. Many of the people to arrive in Sydney at that time were military, some with wives and family; there were also some free settlers. The first chaplain of the colony was the Reverend Richard Johnson of the Church of England. No specific provision was made for the religious needs of those many convicts and settlers who were Roman Catholics. To redress this, an Irish Catholic priest, a Father O'Flynn, travelled to the colony of New South Wales but, as he arrived without government sanction, he was sent home. It was not until 1820 that two priests, Father Conolly and Father John Therry, arrived to officially minister to the Roman Catholics in Australia. Father Conolly went to Tasmania and Father Therry remained in Sydney. Therry claimed that, on the day of his arrival, he had a vision of a mighty church of golden stone dedicated to the Blessed Virgin Mary