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
Nairobi and gurdwaras within the city. Prominent places of worship in Nairobi include the Cathedral Basilica of the Holy Family, All Saints Cathedral, Ismaili Jamat Khana, and Jamia Mosque. Nairobi has two informal nicknames. The first is ""The Green City in the Sun"", which is derived from the city's foliage and warm climate. The second is the ""Safari Capital of the World"", which is used due to Nairobi's prominence as a hub for safari tourism. There are a number of shopping malls in the Nairobi Area. These include: Garden city mall, Thika road mall (TRM), the West Gate mall, Prestige Plaza,