The landlocked Czech Republic, combined with Slovakia, Austria, Germany, and Poland, has 14 regions and is a member of the European Union. Prague, Central Bohemia, and Moravian-Silesian are the three most important regions. Czechia, with its 78,866 square kilometer surface area, is one of the smaller countries in the European Union. Because of its continental European climate, it has dry, warm summers and somewhat chilly winters. Its morphology is made up of rugged terrain in the east and rolling plains in the west. Over 10 million people call that place home. The largest city in the country is Prague, which has 1.3 million residents and is also its capital.Two additional important cities are Brno and Ostrava.The largest airport is Václav Havel Airport Prague (PRG), handling 17 million passengers a year. Prague Airport has links to nearly every place on the planet. This has a significant positive impact on the country's tourism sector. Czech culture is influenced by an array of historical events that impacted the country and its people. A considerable segment of the population does not follow any religion. The majority religion is Christianity (38%). Czech is the official language of the nation. The civil code is the legal system.. Prague's Václav Havel Airport (PRG) is the largest airport, handling 17 million people a year. Nearly every place on Earth can be reached from Prague Airport. This considerably boosts the success of the country's tourism sector. Czech culture is influenced by a range of historical occurrences that helped to form the country and its citizens. Many people in the population do not follow any religion. Three-quarters of people identify as Christian. Czech is the nation's official language. The Civil Code is the body of laws.