Nairobi to Pumwani Division in terms of boundaries. Nairobi is divided into seventeen constituencies and eighty five wards, mostly named after residential estates. Kibera Division, for example, includes Kibera (Kenya's largest slum) as well as affluent estates of Karen and Langata. Nairobi is home to the Nairobi Securities Exchange (NSE), one of Africa's largest. The NSE was officially recognised as an overseas stock exchange by the London Stock Exchange in 1953. The exchange is Africa's 4th largest in terms of trading volumes, and 5th largest in terms of Market Capitalization as a percentage of GDP. Nairobi is the regional headquarters of
History of Nairobi plague and the subsequent burning down of the original town. By 1905, Nairobi was a humming commercial center and replaced Mombasa as capital of the British East Africa. The city expanded, supported by the growth in administrative functions and in tourism, initially in the form of British big game hunting. As the British colonialists explored the region, they began using Nairobi as their first stop. This prompted the colonial government to build several grand hotels in the city for British tourists and big game hunters. Nairobi continued to grow under British rule, and many Britons settled within the city's suburbs.