The United Nations Human Settlements Programme (UN-Habitat) is the United Nations programme for human settlements and sustainable urban development. It was established in 1977 as an outcome of the first United Nations Conference on Human Settlements and Sustainable Urban Development held in Vancouver, Canada, in 1976. UN-Habitat maintains its headquarters at the United Nations Office at Nairobi, Kenya. It is mandated by the United Nations General Assembly to promote socially and environmentally sustainable towns and cities with the goal of providing adequate shelter for all. It is a member of the United Nations Development Group. The mandate of UN-Habitat derives from the Habitat Agenda, adopted by the United Nations Conference on Human Settlements in Istanbul, Turkey, in 1996. The twin goals of the Habitat Agenda are adequate shelter for all and the development of sustainable human settlements in an urbanizing world.

Joan Clos i Matheu, GCIH is a Spanish politician who was mayor of Barcelona, Spain from September 1997 to September 2006. He took over from Pasqual Maragall in 1997. In 1999 he was elected to a four-year term, and was then re-elected in the municipal elections of 25 May 2003. In September 2006, he left Barcelona Town Hall, after nine years of office, as he was appointed Minister of Industry, Tourism and Trade by Spanish Prime Minister José Luis Rodríguez Zapatero. After a stint as the Spanish Ambassador in Turkey and Azerbaijan, in 2010 he was appointed as executive director of the United Nations Human Settlements Programme, (UN-HABITAT), and Under Secretary General of the United Nations. Joan Clos is also president of the Spanish Chapter of The International Real Estate Federation (FIABCI).