Johannesburg is a large city in Gauteng Province of South Africa. It was established as a small village controlled by a Health Committee in 1886 with the discovery of an outcrop of a gold reef on the farm Langlaagte. The population of the city grew rapidly, becoming a municipality in 1898. In 1928 it became a city making Johannesburg the largest city in South Africa. In 2002 it joined ten other municipalities to form the City of Johannesburg Metropolitan Municipality. Today, it is a centre for learning and entertainment for all of South Africa. It is also the capital city of Gauteng. Prehistoric Era The region surrounding Johannesburg was originally inhabited by hunter-gatherers who used stone tools. The Magaliesberg valley north of Johannesburg was ideal for farming, and farmers settled there by the 6th century. By the 13th century, stone-walled ruins of Sotho–Tswana towns (e.g Kweneng) and villages are scattered around the parts of the former Transvaal in which Johannesburg is situated. Many of these sites contain the ruins of Sotho–Tswana mines and iron smelting furnaces, suggesting that the area was being exploited for its mineral wealth before the arrival of Europeans or the discovery of gold. The most prominent site within Johannesburg is Melville Koppies, which contains an iron smelting furnace. Republican Era European Settlement and gold mining After the Great Trek European pastoralists also started settling in the Transvaal. Some of them chose to farm where Johannesburg was to rise later. Each burgher (citizen) was entitled to at least one farm, measuring 1500 morgen or about 3100 acres. The first recorded discovery of gold on the Witwatersrand was made by Jan Gerrit Bantjes in June 1884, on the farm Vogelstruisfontein. Other farms to become famous later included Langlaagte, Turffontein, Doornfontein and Braamfontein. George Harrison is today credited as the man who discovered an outcrop of the Main Reef of gold on the farm Langlaagte in February 1886. On 12 May 1886 Harrison and his partner, George Walker, entered into a prospecting agreement with the owner of Langlaagte, one G.C. Oosthuizen. Two days later Colonel Ignatius Ferreira staked out his camp on Turffontein to serve as a centre for diggers. Louwrens Geldenhuys found the Main Reef on Turffontein and Henry Nourse located it on Doornfontein. On 8 September 1886 nine farms, extending from Driefontein in the east to Roodepoort in the west, were declared public diggings Carl von Brandis