The city of Johannesburg lies at the centre of the largest urban conurbation in sub-Saharan Africa. In the past, this conurbation was known by the clumsy acronym ‘PWV’, which stood for the Pretoria-Witwatersrand-Vereeniging complex. Today, this urban region has the political status of a province and has been re-named ‘Gauteng’, a popular local name meaning ‘place of gold’. A province that is almost entirely urban, Gauteng is home to 7.3 million people: about one-third of the national urban population of 21.8 million.2 At the last census in 1996, the population of Johannesburg itself was about 2.6 million.3 In the national hierarchy, this placed the city of Johannesburg just after the largest city in South Africa, namely Durban (2.8 million) and marginally ahead of Cape Town (also about 2.6).