Hillsong Church is a Pentecostal megachurch affiliated with Australian Christian Churches (the Australian branch of the Assemblies of God) and located in Sydney, Australia. The church's senior pastors, Brian and Bobbie Houston, began the church in 1983 as the Hills Christian Life Centre in Baulkham Hills. Hills Christian Life Centre later merged with Sydney Christian Life Centre at Waterloo. Over 20,000 people attend services each week. While headquartered at its "Hills" campus in Baulkham Hills' Norwest Business Park in the Hills District, Hillsong is a multi-site church with another congregation, designated the "City" campus, located in Waterloo, near Sydney's central business district. In 2009, a third Sydney campus, "South West", located in Campbelltown and a fourth interstate campus, the "Brisbane" campus in Mount Gravatt, were added. Apart from the four main campuses, Hillsong Church currently has 14 extension services across Sydney. These extension services are based on either location or culture and rely on Hillsong Church for support and leadership. Hillsong Church's international offshoots include Hillsong Church London, in the United Kingdom, Hillsong Church Kiev in Ukraine, Hillsong Church Cape Town in South Africa and Hillsong Church Stockholm in Sweden. Hillsong officially launched their latest international offshoot, Hillsong NYC, in October 2010. Hillsong services are also held in Paris, Berlin, Amsterdam and Moscow. Hillsong Music has topped Australian charts, with albums achieving gold and platinum sales status. Hillsong is known internationally through its teaching, album sales, and the annual Hillsong Conference, which attracts over 28,000 people. The Hillsong Television program is seen in over 160 countries and Hillsong International Leadership College is attended by over 900 students.