Before 1972, Winnipeg was the largest of thirteen cities and towns in a metropolitan area around the Red and Assiniboine Rivers. In 1960 the Metropolitan Corporation of Greater Winnipeg was established to co-ordinate service delivery in the metropolitan region. A consolidated metropolitan "unicity" government incorporating Winnipeg and its surrounding municipalities was established on 27 July 1971, taking effect in 1972. The City of Winnipeg Act incorporated the current city. In 2003 the City of Winnipeg Act was repealed and replaced with the City of Winnipeg Charter.