İzmir, historically Smyrna, is the third most populous city of Turkey and the country's largest port after İstanbul. It is located in the Gulf of İzmir, by the Aegean Sea. It is the capital of İzmir Province. The city of İzmir is composed of 9 metropolitan districts. These are Balçova, Bornova, Buca, Çiğli, Gaziemir, Güzelbahçe, Karşıyaka, Konak, and Narlıdere. Each district, and generally the neighborhoods within it, possesses distinct features and a particular temperament (for detailed information, see the articles on these districts). İzmir is the inheritor of almost 3,500 years of urban past, and possibly up to that much more in terms of advanced human settlement patterns. It is Turkey's first port for exports and its free zone, a Turkish-U.S. joint-venture established in 1990, is the leader among the twenty that Turkey counts. Its workforce, and particularly its rising class of young professionals, concentrated either in the city or in its immediate vicinity (such as in Manisa), and under either larger companies or SME's, affirm their name in an increasingly wider global scale and intensity. İzmir is widely regarded as one of the most liberal Turkish cities in terms of values, ideology, lifestyle, dynamism and gender roles. It is a stronghold of the Republican People's Party.