The Turnhalle Constitutional Conference was a conference held in Windhoek between 1975 and 1977, tasked with the development of a constitution for a self-governed Namibia under South African control. Sponsored by the South African government, the Turnhalle Conference laid the framework for the government of South West Africa from 1977 to independence in 1989. As a result of the Turnhalle Conference the Democratic Turnhalle Alliance party was formed in 1977, which won the 1978 election and formed an interim government.