With the exception of the episcopate of William Elphinstone (1484–1511), building progressed slowly. Gavin Dunbar, who followed him in 1518, completed the structure by adding the two western spires and the southern transept. It is now a congregation of the Church of Scotland. Aberdeen has two other cathedrals: St. Mary's Cathedral is a Roman Catholic cathedral in Gothic style, erected in 1859. In addition, St. Andrew's Cathedral serves the Scottish Episcopal Church. It was constructed in 1817 as Archibald Simpson's first commission and contains a memorial to the consecration of the first bishop of the Episcopal Church in the United States of America, which took place nearby. In 1804, St Peter's Church, the first permanent Roman Catholic church in the city after the Reformation was built. Numerous other Protestant denominations have a presence in Aberdeen. The Salvation Army citadel on the Castlegate dominates the view of east end of Union Street. In addition, there is a Unitarian church, established in 1833 and located in Skene Terrace. Christadelphians have been present in Aberdeen since at least 1844. Over the years, they have rented space to meet at a number of locations and currently meet in the Inchgarth Community Centre in Garthdee. There is also a Quaker meetinghouse on Crown street, the only purpose built Friends meeting house in Scotland that is still in use today. In addition, there are a number of Baptist congregations in the city, and Evangelical congregations have been appearing in significant numbers since the late 2000s. The city also has two meeting houses of the Church of Jesus Christ of Latter-day Saints (LDS Church). There are also four mosques in Aberdeen which serve the Islamic community in the city. There is an Orthodox Jewish Synagogue established in 1945. There is also a Thai Buddhist temple located in the Hazelhead area of the city. There are no formal Hindu buildings, although the University of Aberdeen has a small Baháʼí society and there is a fortnightly Hindu religious gathering in the first and third Sunday afternoons at Queens Cross Parish church hall. Economy Traditionally, Aberdeen was home to fishing, textile mills, shipbuilding and paper-making. These industries have been largely replaced. High technology developments in the electronics design and development industry, research in agriculture and fishing and the oil industry, which have been largely responsible for Aberdeen's economic growth, are now major parts of Aberdeen's economy. Until the 1970s, most