from Wikipedia Nairobi:
Nairobi (pronounced /naɪˈroʊbɪ/) is the capital and largest city of Kenya. The name "Nairobi" comes from the Maasai phrase Enkare Nyirobi, which translates to "the place of cool waters". However, it is popularly known as the "Green City in the Sun."
Founded in 1899, the city was handed capital status from Mombasa in 1905. Nairobi is also the capital of the Nairobi Province and of the Nairobi District. The city lies on the Nairobi River, in the south of the nation, and has an elevation of 1661 m (5450 ft) above sea-level.
Nairobi is the most populous city in East Africa, with an estimated urban population of between 3 and 4 million. According to the 1999 Census, in the administrative area of Nairobi, 2,143,254 inhabitants lived within 684 km². Nairobi is currently the 4th largest city in Africa.
Nairobi is now one of the most prominent cities in Africa politically and financially. Home to many companies and organizations, Nairobi is established as a hub for business and culture. The Globalization and World Cities Study Group and Network (GaWC) defines Nairobi as a prominent social centre.
Nairobi was ranked at 58th in the Capital of the World rank. The list ranks of cities in order of their prominence as a global capital as an economic and cultural powerhouse.