Poland Polish: Rzeczpospolita Polska, is a unitary sovereign state in Central Europe. It is divided into 16 administrative subdivisions, covering an area of 312,679 square kilometres (120,726 sq mi) with a mostly temperate climate. With a population of over 38.5 million people, Poland's capital and largest city is Warsaw. Other major cities include Kraków, Åódź, WrocÅ‚aw, PoznaÅ„, GdaÅ„sk, and Szczecin. Poland is a developed market and regional power as well as a possible emerging world power. It has the eighth largest and one of the most dynamic economies in the European Union, simultaneously achieving a very high rank on the Human Development Index. Additionally, the Polish Stock Exchange in Warsaw is the largest and most important in Central Europe. Poland is a developed and democratic country, which maintains a high-income economy along with very high standards of living, life quality, safety, education and economic freedom. According to the World Bank, Poland has a leading school educational system in Europe. The country provides free university education, state-funded social security and a universal health care system for all citizens. Having an extensive history, Poland has developed a rich cultural heritage, including numerous historical monuments. It has 15 UNESCO World Heritage Sites, 14 of which are cultural. Poland is a member state of the European Union, the Schengen Area, the United Nations, NATO, the OECD, the Three Seas Initiative, and the Visegrád Group.