Nairobi fought fiercely to save the indigenous Karura Forest in northern Nairobi which was under threat of being replaced by housing and other infrastructure. Nairobi's western suburbs stretch all the way from the Kenyatta National Hospital in the south to the UN headquarters at Gigiri suburb in the north, a distance of about . The city is centred on the City Square, which is located in the Central Business District. The Kenyan Parliament buildings, the Holy Family Cathedral, Nairobi City Hall, Nairobi Law Courts, and the Kenyatta Conference Centre all surround the square. Under the Köppen climate classification, Nairobi has a
Cathedral Basilica of the Holy Family, Nairobi administrative building for the archbishop's office was being built by the Chinese construction company Zhongxing Construction in 2011. The cathedral is the headquarters of the Archdiocese of Nairobi. The current archbishop is John Njue who was made a Cardinal in 2007. The Archdiocese of Nairobi contains an estimated population of 4 million people of which 1.6 million are thought to be Catholic. These 4,000 Christian communities are served by 182 clergy, eight university level education facilities and several places for retreat. Services are available through-out the week within the Cathedral and one of the chapels is always open. In addition